This was an experimental cartridge based on the 500 Jeffery case, developed around 2002 – 2003 by Bertrams for a potential sniper rifle system for the USMC.
12.7 X 53 SNIPER XPL BY BERTRAM
This was an experimental cartridge based on the 500 Jeffery case, developed around 2002 – 2003 by Bertrams for a potential sniper rifle system for the USMC.