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

ARC Rifle Zeroing KL Video 6
ARC Rifle Zeroing KL Video 6

NRA America’s Rifle Challenge: Kyle Lamb’s Guide to Zeroing Your Rifle for ARC

Kyle Lamb zeroes three rifles across ARC’s Stock, Limited and Open divisions, then demonstrates height-over-bore holds at 10 yards and mil-based elevation dials out to 384 yards.

Anderson Shares Singles Title After 450-Target Marathon at Southern Grand American

Weston Anderson and Ricky Marshall, Jr., declared Singles Co-Champions after breaking 450 consecutive targets at 2026 Southern Grand American.

Clay Blackketter Claims Open Division Title at 2026 Southern Iowa Showdown

Team Hornady’s Clay Blackketter wins Open division at 2026 Southern Iowa Showdown shooting A-Tip Match bullets.

Team Remington Dominates Junior, Veteran Divisions at 46th Southern Grand American

Team Remington captures two championship titles at the 46th Southern Grand American at Silver Dollar Shooters Club in Florida.

USA Shooting Junior Program Gets a Boost From MidwayUSA Foundation Lones Wigger Endowment Grant

A grant from the MidwayUSA Foundation’s Lones Wigger Endowment will cover ammunition, targets, entry fees and travel for USA Shooting’s junior athletes, including the 2026 ISSF Junior World Championship in Germany.

Your NRA In Your Pocket: Official App Now Available on iOS and Android

The NRA’s new official app offers a digital membership card, NRA-ILA news, digital magazines, local event search and exclusive member benefits on iOS and Android.

Interests



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