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

Wright Milancortina2026 1
Wright Milancortina2026 1

Milan Cortina 2026: Campbell Wright Takes 12th in Men’s Biathlon Sprint, Eyes Pursuit Podium on Sunday

Campbell Wright finished 12th in the men’s 10 km sprint biathlon race at Milan Cortina 2026, positioning himself for a pursuit bid on Sunday.

Milan Cortina 2026: Freed Leads Team USA Women Through Biathlon’s Toughest Test in Olympic Debut

Margie Freed leads Team USA women in her Olympic debut at Milan Cortina 2026, finishing 21st in the 15 km individual biathlon while teammate Deedra Irwin placed 34th.

American Rimfire Association Opens Benchrest Competition by Lowering the Cost to Participate

The American Rimfire Association expands rimfire benchrest competition through affordable factory-class rules, youth-friendly policies and inclusive match formats that welcome all shooters.

A Decade on the Firing Line: The National Matches 1920–1929

From Camp Perry’s wind flags to Sea Girt’s surf, the 1920s remade the National Matches into America’s proving ground for pistol, smallbore and high power competition.

Registration Open for 2026 Winchester & White Flyer Top Shot Youth Championship at NILO

Winchester and White Flyer bring the Top Shot Youth Championship back to NILO for a third year with big prizes and family-friendly competition.

Team Remington’s Powell and Hitch Dominate 2026 Caribbean Classic

Team Remington’s Powell and Hitch posted solid scores across multiple events at the 2026 Caribbean Classic in Florida.

Interests



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