John Flanagan of Sabot Designs, a manufacturer known for his flechette-loaded shotgun shells, pointed out that the usual culprit was solvent in the powder doing what solvents do, reacting with other chemical compounds, in this case the primer, rendering the round a dud. As a contractor making ammunition for the government, Flanagan is well aware of this problem and how to deal with it. Flanagan also helped me get the relevant government documents I’ll reference in this story.

THE SOLVENT ISSUE

To begin with, nitrocellulose powders require a solvent to gelatinize them so that they can be formed into balls, flakes, cylinders, or strips. Single base powders are typically an ether-alcohol colloid of nitrocellulose. Double base powders are made from nitrocellulose and nitroglycerine and use ether, ethyl acetate, or isooctanol, as processing solvents. Much of this solvent is lost in processing. The solvent must remain at the minimum level to keep the propellant from becoming brittle and losing plasticization causing the powder grains to turn to dust which will raise pressure dangerously as the smaller the fuel the faster it burns. Just look at how much faster a pile of wood shavings burns than a big log does. Without a certain amount of solvent, you cannot keep the dimensional stability of the powder grains.

This solvent will also act on primer compounds, rendering them incapable of detonation. Because of this, the mil-spec limit for residual solvent in the dried powder is 0.25 weight-% (0.25% of the powder weight). If this limit is exceeded, the life of the primer will be shortened accordingly. These solvents off-gas from the powder and are what you smell when you open a powder can. Back in the days of the Army Coast Artillery, the powder magazines contained so much ether that many thought it was put there deliberately to somehow preserve the powder when, in reality, it was just massive amounts of off-gassing in a confined area.

STUDIES HAVE BEEN DONE

To give you an idea of how much gas can come out of the powder, here is the results of a U.S. military test. A 75-liter drum was filled with 150 pounds of propellant powder containing residual solvent content of 0.25 weight-% (the mil-spec limit for dried propellant). There were approximately 70 grams of solvent. 12 grams of solvent were in the vapor phase and of these, 7 grams were in the space above the propellant and 5 grams occupied the space between the powder grains. The remaining 158 grams of solvent were trapped in the propellant grains.

The 12 grams in the vapor phase were in the form that can act as a solvent on the primer compound. When you add a solvent to primer compound you interfere with its performance, as you’re breaking down the explosive mixture.

This information came from a several government studies I found including:

• 1951, Great Britain’s Ministry of Defense study, Interior Ballistics authored by F.R.W. Hunt (pages 1-7)
• 1966, Julian S. Hatcher, Hatchers Notebook (pages 353-360)
• 1970, E.R. Lake’s Percussion Primer Design Requirements. (pages 2-5)
• 1994, U.S. Army Research Laboratory LOVA Propellant Aging: Effects of Residual Solvent study (pages 1-2, 6, 11, 13)
• 1980, U.S. Army Armament Research and Development Command study titled A Compilation of Hazard and Test Data for Pyrotechnic Compositions (pages 57, 62, 63.)
• 2019, Joint Ordnance Test Procedure (JOPT)-022 Safety and Suitability for Service Assessment Testing for Small Caliber Ammunition Less Than 20MM (appendix A.1-A.5)

WHY IT HAPPENS

Everyone knows not to store ammo at high temperatures, but few know the real reason why. High temperatures drive the solvent into the vapor phase and the solvent vapor kills the primers.

Nitrocellulose itself deteriorates over time yielding acidic byproducts such as nitric acid which can also attack primers. Some powders contain calcium carbonate to neutralize these acids. To absorb the decomposition products of nitrocellulose and nitroglycerine-based powders and prevent their buildup and catalyzing the decomposition stabilizers are added such as diphenylamine, mineral jelly, carbamite, pictrite, and calcium carbonate. These may also act as cooling agents and gelatinizers. These stabilizers can be a health hazard in large quantities and the military has been doing studies on their effect on artillerymen who encounter massive amounts of smoke and chemical residue when firing their artillery.

The combination of all these solvents, acids, and chemicals reacting together results in a complicated combination of solvent gasses with multiple compounds present to interact with your primers. Even the oxidation of lead bullets can spread to the primer and result in a dead primer.

Among the escaping solvent gasses are ether, ethyl acetate, acetic acid, oxalic acid, nitric acid, carboxlic acid, isocatanol, and isoctanoic acid. Ingredients may vary due to the different chemicals initially present in the powder.

All of this volatile chemical cocktail residing in a cartridge case is injurious to primers and over time, when stored improperly, can turn them into duds. If the powder contains more residual solvent content than the mil-spec previously alluded to then the primer will go bad much faster. This seems to be the case with some of the recent lots of commercial ammo that has quickly gone bad in 10 years or less.

From a manufacturing perspective, it’s clear that too much solvent will kill the primer. J. J. Reich of Federal Ammunition says that this is, indeed, why high heat will cause ammunition to go bad. The heat drives the solvent out of the powder and sets it loose to attack the primer. Reich also pointed out that some of the current powders (not those used by Federal) are so hydroscopic that they will absorb enough water in a normal humidity house for the powder fail to ignite.

Joel Hogdon of Remington Ammunition says his company avoids this issue by storing its powder where ventilation can prevent the buildup of gasses coming off the powder and spoiling it by sticking around. He advised that any powder that is discolored, causing a powder can to bulge, or producing a bad smell, should be discarded. Primers, he said, should not be unboxed and left out to absorb moisture before loading into cartridges.

Interestingly, some bullets are now made of porous, powdered metal that can admit moisture to the powder within the cartridge case. The solution to this is a liquid sealant, says Jonathan Langenfeld, the head of R&D engineering at Remington Ammunition. But some types of modern primers must be able to breathe, so you apply the sealant to one side of the primer on some and both sides on others… as well as the bullet. Vacuum seal-finished ammo is another a surefire way to beat moisture absorption by certain hydroscopic gun powders and primer compounds.

OTHER CAUSES

There is one other compound that can sometimes attack primers. Years ago, I had some lead-bullet 38 S&W ammo go bad while the Winchester Lubaloy-coated bullets of the same vintage all fired. The Montana state chemist at the time, John Buchanan, told me that sometimes lead oxide from old lead bullets can react with primers and kill them.

Another thing to consider is that primers require a fast, hard strike penetrating a minimum of 0.017-inch depth to go off. Seth Swerczek at Hornady Ammunitionpoints out that if improper headspace puts the primer out of reach, or there is a slow lock time as can occur with dirt or with congealed lubricant in cold weather, then the primer may not be indented fast enough to fire. He also said that it was sometimes possible for 1-3 primers out of a million produced to be incomplete, lacking anvil or primer compound and thus incapable of firing, though he stressed this was very rare.

THE SOLUTION

The solution is two-fold, depending on how you get your ammo.

For handloaders, use powder that does not exceed the mil-spec limit for solvent in dried propellant. Then, when making your cartridges, shield the primer from the solvents and acids. This was done in the past by the military as shown in the Army’s production drawings of the .45 ACP and 30-06 ammo. Note the part labeled “Seal, case vent” between the primer and the powder charge. That seal is a ten thousandth of an inch thick celluloid plug. It was installed by inserting a strip of ten thousandth of an inch thick celluloid over the primer pocket before seating the primer. The primer punches out the celluloid plug when it is installed, and it stays in place. Ammo thus sealed does not go bad. This is a very cheap and simple solution that anyone loading ammunition can employ regardless of whether you have a big factory with giant plate loaders turning out millions of rounds or a simple Lyman tong tool for reloading.

Handloaders can source these celluloid strips from Flannigan at Sabot Designs LLC, who I previously mentioned above. Flannigan has agreed to sell these strips to any individual handloader or ammunition manufacturer that wants them. Once in place, the primer is protected from the solvents and acids from the propellant powder, so things always go bang when they are supposed to.

For those buying commercially loaded ammunition, look for fresh ammunition lots and store your ammunition away from heat, humidity, and gun cleaning solvents, as these solvents can also attack and kill primers, especially those solvents with an ammonium base.

In the past people blamed the primers but blaming the primer after chemically attacking it is not right. You must put the blame where it belongs. On the chemicals that neutralized the primer.

2006 marks the 100th Anniversary of the quintessential American 20th Century military cartridge. While outdated by modern cartridges it has been kept alive by nostalgia and the deep affection of shooters and collectors the world over.

The average gun enthusiast may be forgiven for wondering what all the fuss is about. After all, didn’t the .30-06 start its service life with a 150-grain spitzer bullet and end its service life with basically the same 150-grain bullet? Well, yes it did, but for the first 50 years of its service life it was available in a myriad of military loadings and for the following 25 years it was used as a vehicle for testing ideas in small arms ammunition development. By the turn of the 21st century, its military use was limited to training purposes and for military salutes.

This article will focus on the U.S. military evolution of the .30-06 and only briefly touch on non-US development and civilian use. Even so, this will be a superficial look at the official U.S. rifle and light machine gun cartridge through two World Wars and countless “Police Actions.”

Politics and Cavalry Charges

To look at the use of the .30-06 around the world is a lesson in geopolitics. Its spread around the world didn’t really occur until after WW2 when the U.S. sought to influence foreign governments, either to stem the spread of communism or to develop trade – and what better way than to provide these friendly governments with your excess munitions. Eventually the .30-06 was used in almost 50 countries.

Even a cursory look at the various .30-06 loadings and how they were developed illustrates the changing face of warfare through the 20th Century – from cavalry charges to “dirty tricks.” The development of the .30-06 through the 1920s and 30s reflected the lessons learned during WW1. However, by the advent of WW2, cavalry charges had been relegated to the history books and the importance of the aircraft was becoming obvious.

During WW2, the diverging requirements of ground, air and sea warfare often resulted in serious development and production delays for the various .30-06 loadings. Basically, they were trying to have a single cartridge do everything.

As the U.S. became more and more involved in S.E. Asia after Korea, it seems that running wars became the province of the intelligence agencies and not the armies, navies and air forces actually doing the fighting.

The .30-06 was replaced by the 7.62mm NATO round in 1954 and U.S. military production for combat use ceased in the 1960s.

Modest Beginnings

The .30-06 was the result of several basic developments that occurred in the late 19th Century: the use of smaller caliber weapons; smokeless powder and rimless cases. The move towards smokeless powder came with the .30-40 Krag introduced in 1892 but this had limited powder capacity.

By 1901, Frankford Arsenal in Philadelphia (the government facility where the majority of ammunition development took place) had developed a rimless .30-caliber round. This was adopted as the .30 Ball Model of 1901 and commonly referred to as the “.30-01”. It used a 220-grain round-nose bullet and it had a thick rim – much thicker than contemporary rimless cartridges. At this time, Springfield Armory was also developing what would become the .30 Rifle, Model of 1903. The .30-01 was also further developed, losing its thick rim but retaining the 220-grain round-nose bullet to become the .30 Model of 1903 – or “.30-03”.

With the rest of the world pursuing pointed bullets, it only took a couple of years for someone to stick a pointed bullet into a .30-03 case that had the neck shortened by 0.10-ins to accommodate the reduced bearing surface of the pointed bullet. Things were simpler in those days and on October 15, 1906, the resulting cartridge was approved as the .30 Cal. Model of 1906, what we now call the “.30-06”.

Loadings

Before discussing the various loadings, we should mention colored bullet tips. The U.S. used these to identify various loadings in the .30-06. The following is a list of the colors used on service rounds and their meaning. Caution is advised if you are using this list to identify a loading as other countries did not always follow U.S. marking practice.

Common U.S. .30-06 Bullet Tip Color Codes

• Black: Armor Piercing (AP)
• Black/Silver: AP Plate Test
• Blue: Incendiary
• Green: AP for UK
• Green/White: Frangible
• Green/Tan: Frangible
• Orange: Tracer
• Red: Tracer
• Silver: Armor-Piercing Incendiary (API) and Navy contract Ball (1941)
• White: Tracer (and unfinished Frangible)
• Yellow: Observation

BALL

The first ball round for the .30-06 used a 150-grain flat-based bullet with a cupronickel jacket. This is referred to as the “M1906” bullet and it remained in use through World War I.

The use of machine guns at long range in that war revealed that the .30-06 was outclassed by rounds firing heavier bullets. Thus, in the immediate post World War I period, the U.S. experimented with heavier bullets. They tested many variations and it is amusing to note that one of the rounds tested at this time used a modified round-nose Krag bullet. The result of these tests was the adoption, in 1925, of the 172-grain boat-tailed “M1” bullet which had a gilding metal (a copper alloy) jacket.

By the mid-1930s it was evident that the use of machine guns at long range was a thing of the past and the recoil of a 172-grain bullet would be uncomfortable for the average GI. As a result, the original 150-grain M1906 bullet was re-adopted in 1937, though it did now have a gilding metal jacket. At first the original nomenclature “M1906 Ball” was used, but this was quickly changed and this new bullet was called the .30 M2 Ball. The 172-grain M1 bullet didn’t go away and continued to be used by the Navy. Initially, M2 ball rounds used a stannic (i.e.: tin) stained bullet to identify them from the M1 and this staining lasted until 1940. To further confuse matters, one of the last lots of M1 ball rounds produced by Frankford Arsenal in 1941 for the U.S. Navy had silver-tipped bullets. These should not be confused with silver-tipped API rounds which didn’t appear until 1943.

During World War II, because of supply problems with strategic materials like copper, the use of a steel bullet jacket was permitted. The jackets were given a gilding-metal plating and are referred to as the “.30 M2 Alternate” – a name which often appears on packaging. Though the supply of copper improved, the M2 Ball and the M2 Alternate Ball bullets continued to be used for the remainder of the .30-06’s military career.

ARMOR-PIERCING (AP)

The first AP round produced in service quantities in the U.S. was the controversial M1917 which had a cupronickel jacket with an exposed lead tip. Since The Hague Convention of 1899 effectively banned the use of expanding bullets on personnel, there were significant worries from the front lines to the extent that General Pershing ordered that it not be used by the American Expeditionary Forces.

The M1917 was quickly replaced by the M1918, which was identical in design except that it did away with the exposed lead tip. It is identified by a smooth cannelure (ring) on the bullet above the casemouth. The M1918 remained the service issue AP for a few years but was replaced in 1922 by a round having a slightly heavier steel core and identified, for the first time, by a black tip to the bullet. It was termed the “M1922” and had a gilding-metal jacket.

By the early 1930s, with the increasing use of armor, significant development took place with high-velocity AP bullets. It resulted in the adoption in 1934 of the high velocity AP M1. It was also identified by a black bullet tip and at 3,180 fps was considerably faster than the M1922 AP’s 2,600 fps. This was very much an interim measure as experimentation continued with this high-velocity series throughout the 1930s. In 1939, this avenue was abandoned and the M1922 was adapted slightly and renamed the AP M2, which remained the standard .30-06 AP bullet until the 30-06 was phased out.

One variation of the AP that wasn’t “service issue” is worth mentioning and this is the AP Plate Test. Loaded at various velocities and provided to companies manufacturing armor plate, it was intended to “proof” the plate prior to government acceptance. Initially they were not identified except by a box label and can be found with a black or a plain bullet tip. From about 1940, when large quantities of these Plate Test AP rounds were made, they were identified by a silver-over-black-tipped bullet.

ARMOR-PIERCING INCENDIARY

While the search for a way to give the small .30-06 AP bullet an incendiary effect started in World War I, it wasn’t until World War II that they had any success. The small lead point filler between the steel core and the bullet jacket was exchanged for a small quantity of a barium nitrate/magnesium mixture called IM-11. First identified by a black and blue bullet tip and called the T15 in 1943, it was quickly changed to a silver bullet tip and called the M14 API. By the late 1940s, they had changed the shape of the AP core which allowed substantially more of the incendiary mixture to be used and this was termed the M14A1.

BLANKS

Blanks were designed to perform a variety of functions from simply noise blanks to the launching of grenades or radio antennas.

In the U.S., the first noise blanks were those using the same paper bullet as used in the .30-03 blank and these were called the M1906 Blank. The paper bullet also contained a charge of powder to facilitate its break up. Some may be found with the tinned cases and in 1909 some .30-03 blanks with this bullet were adapted to the .30-06 chamber by resizing the neck.

Due to the cost and complex production process, an alternative to the paper bullet blank was designed that had a casemouth simply roll-crimped over a tan cup-shaped wad and this was adopted as the M1909 Blank. It went through a series of improvements, the most notable of which was the use of a simple red card wad, and was the standard noise blank for the life of the .30-06.

Grenade blanks first appeared on the scene in the early 1920s. Most of these functioned on a rod-type grenade and used a heavy powder charge to propel it. These were eventually standardized as the M3 Grenade Blank in 1941. This was identified by a rose-crimped casemouth with a red seal. Also of note is that throughout its life, the powder charge was a mixture of smokeless and black powder.

One interesting grenade blank from the 1920s is that made for the Viven-Bessiere practice grenade, which functioned by using the residual gases of a ball cartridge with the bullet passing through the center of the grenade. Since the danger space of a ball round greatly exceeds the danger space for the grenade (the bullet being able to travel much further than the grenade), a blank using a solid wood bullet was designed that could launch the practice grenade in range areas too small to accommodate a full-power ball cartridge.

It is worth mentioning here that you cannot safely tell a noise blank from a grenade blank strictly by its appearance. While the U.S., for the most part, used a blank with a roll-crimped casemouth over a red wad as the service issue noise blank, other countries did not adhere to this identification. In addition, there are numerous movie blanks that used military surplus cases, with a rose-crimped casemouth. Lake City made several batches of .30-06 blanks as late as 2002 for veterans’ funerals and these had a rose-crimped casemouth.

While not a U.S. development, Norway, France and Germany made extensive use of plastics for blanks starting in the 1950s. The U.S. did not embrace plastic cartridges in small arms ammunition in those days and even now there seems to be some reluctance. Nevertheless, these are colorful variations and perhaps the most familiar in the U.S. is the blank made of gold-colored plastic that was used in the movie “The Longest Day.”

DUMMIES

The early drill practice dummies (called the M1906 Dummy) had 6 corrugations running down the tinned case and from 1 to 4 holes in the case. It evolved, losing the tin plating, and gradually reducing the number of case holes until there were none, but retained its “Dummy M1906” designation through World War II. It was resurrected in the Korean War as the Dummy M40 and may frequently be encountered with a corrugated steel case.

Dummies for weapon functioning and inspection normally have smooth cases as corrugations might not reveal imperfections in an action or chamber. These smooth-case dummies first appeared at the end of World War I. These were usually tinned with two holes in the case. In 1938 a similar dummy, called the M2, was introduced with the tinned case and from one to three holes. It was made through the 1950s and is often seen with a plain brass or steel case.

The Range Dummy is, as far as we know, unique to the .30-06. It appeared in 1920 as a device for detecting flinching with recruits on the firing range. Identified only by a tinned primer and a groove cut in the head of the case, it was slipped into a magazine by the instructor without the knowledge of the recruit. It remained in use in some places until the early 1940s.

Perhaps the oddest .30-06 dummy is that intended for the Hollifield Target Practice Rod device. A special rod with a sharp point was fitted into the rifle barrel. The “Dotter” cartridge also had a rod in it and when it was “fired” the blow was transmitted to the rod in the barrel which popped out and pricked a paper target hung just in front of the muzzle. Designed in 1908 it was used extensively through World War I.

FRANGIBLE

The development of the frangible cartridge (i.e.: where the bullet breaks up on impact without damaging the target) illustrates the challenges endured by developers faced with different requirements from each branch of the Armed Forces.

In the early 1940s, the basic idea was to be able to train bomber gun crews by having them fire at real aircraft. Initially the Air Force approached the Ordnance Department but nothing happened. To cut a long story short, the NDRC (National Defense Research Committee – a civilian “think-tank”) was contacted. Duke and Princeton Universities got involved and eventually developed the frangible cartridge two years later. The mottled green/gray bullet was a mixture of bakelite and powdered lead referred to as RD-42-93. It was identified by a green and white bullet tip and muzzle velocity was a mere 1,360 fps. It was initially called the T44 Frangible but formally accepted in April, 1945 as the M22. A minor variation, the T74, using a tan over green bullet tip was developed in 1945 using a different propellant. By this time, the limited value of .30 cal. aircraft armament had been realized and most aircraft had been upgraded to .50 cal. machine guns.

GUARD & GALLERY

While these were initially considered separate loadings, they eventually filled both functions. The first Guard cartridges appeared in 1907 for use by sentries at military installations and prisons in urban areas. They were identified by 5 cannelures in the middle of the case and had a very small powder charge (muzzle velocity was 1,200 fps). The cannelures were its downfall as the case would separate in a dirty chamber. The identification was then changed to 6 short corrugations on the case shoulder. Production ceased about 1918 though it was still issued for a number of years after that.

Gallery or “Short-range” cartridges were used for training purposes. Up until 1919, various solutions were tried and the most common being a 198-grain pointed lead bullet called the “Ideal” bullet. It was replaced by a 140-grain lead bullet that became the Gallery Practice M1919. This nomenclature was changed again in 1933 when it became the M1 Guard Cartridge.

Countries like Norway and Germany used plastic cases and/or plastic bullets in .30-06 short-range cartridges from the 1950s. Again, these did not prove popular in the U.S.

INCENDIARY

The earliest .30-06 incendiary round was the M1917 which had a charge of white phosphorous and was identified by a flat tip bullet. The side of the bullet had a small hole that was sealed with solder which melted as the bullet traveled down the barrel – igniting the phosphorous on contact with the air.

This was quickly replaced by the M1918 which was identical internally but had a blackened pointed bullet to match the trajectory of the ball cartridge of the day. With experience passed on from the R.A.F. following the Battle of Britain, the U.S. was able to develop a bullet with a charge of barium nitrate/magnesium as the incendiary agent inside a steel sleeve. It was identified by a blue bullet tip and was accepted as the M1 Incendiary in 1941. It remained virtually unchanged for the rest of its service life.

SPORTING

While sporting cartridges are beyond the scope of this article, it is worth mentioning one commonly encountered load that had a military connection. It was made by Remington with a 280-grain round-nose soft-point bullet and packaged in military style boxes with a government contract number. Folk-lore has its purpose as protecting Alaskan bases from polar bears. As has recently been discovered, these were actually a contract for Springfield Armory in Massachusetts for their heavy recoil tests of 1955.

TRACER

The earliest .30-06 tracer you are likely to encounter is the M1917, which was identified by a chemically blackened case and used through World War I. The bullet had a cupronickel jacket until 1921 when it was changed to gilding metal.

In the 1920s there was considerable effort to improve the tracer with the M1923 and then the M1924 Tracers being adopted, both identified by black cases. It was renamed the “M1 Tracer” in 1926 and in 1930 the identification was changed from a black case to a red bullet tip. It remained in service into World War II when the differing requirements of air and ground wars triggered further development. Like its ball counterpart, the use of steel jackets was permitted in 1943 and packaging may be seen labeled “M1 Alternate Tracer.”

While the M1 tracer was used until the end of WW2, a short-trace version was developed in 1942 and became the “M2 Tracer.” Initially it was identified by a white bullet tip but this was quickly changed to a red bullet tip with an additional knurled cannelure on the bullet. Also in 1942, the Air Force voiced the need for a dark-ignition trace; one that would not blind the pilot. The result was a dim-ignition tracer at first called the T10 and later adopted as the M25 in 1945 with an orange tipped bullet. It remained the standard tracer for the rest of the .30-06’s military life.

SPECIAL PURPOSE LOADINGS

While there were many experimental loads developed in its first 50 years, we will concentrate here on a few of the unusual loads that illustrate the .30-06 usage in the 1950s and 60s.

Multiball

The concept of firing multiple projectiles with one shot is as old as ammunition itself. As far as the .30-06 is concerned there were experiments by Greener of the UK in the post World War I period with duplex and triplex loads being developed. In the U.S., it wasn’t until Project Salvo (1952-1961) that serious development took place along these lines. Commonly seen with both the standard length case and ones with an extended neck holding two or three bullets, these were developed by Olin (who owned Winchester-Western). Of note is the powder charge between the bullets to ensure separation and the fact that they had to angle the base of the lower bullets to ensure sufficient dispersion to make it worth while. Some of these rounds had colored bullet tips to identify special lots.

Explosive/Observation

These were designed to either increase damage to a target or to indicate the point of impact – often in a sub-caliber device. There were World War I experiments with a blunt-nose bullet with protruding nipple/firing pin, and World War II experiments using the Pomeroy bullet done by Winchester. The latter bullet is notable in that it has a capsule of dynamite in the nose activated by the bullet’s rotation. Both Frankford Arsenal and Winchester developed observation bullets with a complex internal mechanism called the T99. These appeared in the early 1950s and were identified by a yellow bullet tip. (A yellow bullet tip was used on a number of experimental loadings and not just observation rounds).

Silent Cartridge

Nothing illustrates the changing use of the .30-06 more than the silent .30-06 cartridge. Using the captive bolt principle, these were an all-steel assembly where a piston propelled a steel bullet that had a nylon driving band. It was developed in the 1960s and eventually patented in 1977. The same concept was applied to the QSPR (Quiet Special Purpose Revolver) rounds for the Viet Nam “Tunnel Rats.”

DUDS

Most will be familiar with the Remington “Accelerator” round that uses a .223-cal. bullet in a plastic sabot to provide a high velocity round as pictured in the lead photo on page 42. The concept was used on what is probably one of the .30-06’s rarest loadings – the Depleted Uranium Discarding Sabot (DUDS). This armor-piercing round was developed during the 1960s and 70’s and used the plastic sabot to hold the uranium slug.

These represent just a few of the special purpose loadings from this era. Others include manstopper, helmet test, radio destructor, flare and tear-gas loads.

U.S. Manufacturers

While many military and commercial manufacturers made the .30-06, this is a listing of the main U.S. Military manufacturers. The headstamp letters used are shown in parenthesis.

• Frankford Arsenal, Philadelphia (FA, FAL) made .30-06 from 1906 until ~1961. It closed in 1977.
• Denver Ordnance Plant, Colorado (DEN) made .30-06 from 1941-1944.
• Des Moines Ordnance Plant, Iowa (DM) made .30-06 from 1942-1945.
• Eau Claire Ordnance Plant, Wisconsin (EC/EW **), made .30-06 from 1942-1943. (** Initially they used “EC” on the headstamp but this was changed to “EW” to avoid confusion with Evansville Chrysler – which didn’t actually make .30-06).
• Lake City Ordnance Plant / Lake City Arsenal / Lake City Army Ammunition Plant, Independence, Missouri (LC), made .30-06 from 1941-1945, 1951-late 1970s, 1993, 2002. Also produced the clandestine headstamp “C / N [false date]” in 1953.
• St. Louis Ordnance Plant, Missouri (SL), made .30-06 from 1941-1945, 1952-1957. Also produced the clandestine headstamp “B / N [false date]” in 1953.
• Twin Cities Ordnance Plant, Minneapolis (TW), made .30-06 from 1942-1945, 1951-1957. Also produced the clandestine headstamp “A / N [false date]” in 1953.
• Utah Ordnance Plant, Salt Lake City, (U, UT), made .30-06 from 1942-1943.

The big commercial companies like Winchester-Western, Remington, Peters, United States Cartridge Company (U.S.C.Co.) and UMC also made .30-06 on government contract at various times.

Chris Punnett is author of the book “.30-06” and Editor of the International Ammunition Association’s Journal (http://cartridgecollectors.org).