What Is That Milsurp Loading?

by
posted on May 16, 2019
** When you buy products through the links on our site, we may earn a commission that supports NRA's mission to protect, preserve and defend the Second Amendment. **
milsurp-throwback1.jpg
As with all milsurp ammunition, we must know more than just the type of cartridge we intend to shoot; as military cartridges were and are routinely loaded with tracer, incendiary and sometimes even explosive projectiles. These all pose obvious hazards, including armor piercing ammo, which have been blamed for sparking wildfires and thus in many places is illegal to shoot.

In the accompanying photo at the top of this article, the headstamp on the .303 British case on the left tells us it was manufactured in 1948 (“48”) at the Greenwood and Batley (“GB”) facility in England, and that the projectile is the MK VII ball round (“7”). The cartridge on the right is a G2 tracer round (“GII”) from the Royal Ordnance Factory, Blackpole, Worcester (“BE”), England, in 1943 (“43”).

More correctly, manufacture of the cartridge cases occurred at these facilities, but “filling” (as the British call it) of the cases with propellant occurred at different locales, probably due to concerns with accidents and sabotage—as well as for dispersing manufacture to mitigate losses from enemy bombings. Therefore, BE cases received their cordite at Swynnerton, and the Abbey Wood and Farnham facilities filled the GB cases.

Information on these headstamps came from the Carpetbagger Aviation Museum in Harrington, United Kingdom. The museum opened in 1993 to honor Americans of the 801st/492nd Bomb Group, which carried out Operation Carpetbagger to supply resistance fighters in Occupied Europe during World War II. The museum also has an extensive ID list of cartridge headstamps used by the U.S. during that war.

More articles from SSUSA Field Editor Art Merrill:

Latest

Tubb Az Ammo 1
Tubb Az Ammo 1

A Tribute To David Tubb

James A. Schmidt II of Arizona Ammunition remembers his longtime friend David Tubb, the champion rifleman and innovator who died July 2.

Steve Gould Sets 201-Yard Clay Target Record With Benelli Ethos SuperSport A.I.

Exhibition shooter Steve Gould broke a clay target at a certified 201 yards with Benelli’s Ethos SuperSport A.I. shotgun and Federal Heavyweight TSS ammunition.

Inside USPSA: The Sport and Community

Jake Martens traces USPSA from its 1976 founding principles to today, exploring what draws competitors to practical shooting and why volunteering sustains the sport.

Inside The Making Of Winchester’s Supreme Long Range Ammo

New for 2026, Winchester’s Supreme Long Range ammunition pairs the in-house BC Max bullet with match-grade components for extreme-distance accuracy and terminal performance.

Smith & Wesson’s America 250 Model 1854 Honors 1776 and Its Own Origin Story

Smith & Wesson commemorates the semiquincentennial with America 250 Model 1854 lever actions in .44 Magnum and .45-70 Government, engraved and suppressor-ready.

New: Swarovski Optik AT Endura 21-65X 75 mm Spotting Scope

Swarovski Optik’s new AT Endura 21-65X 75 mm spotting scope pairs a 75 mm objective lens with a 53.3-ounce build at a $2,899 price.

Interests



Get the best of Shooting Sports USA delivered to your inbox.