.45 GAP
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The .45 GAP or .45 Glock is a pistol cartridge designed by Ernest Durham, an engineer with CCI/Speer, at the request of firearms manufacturer Glock to provide a cartridge that would equal the power of ... Wikipedia
Bullet diameter: .452 in (11.5 mm)
Designed: November 2002
In service: 2003–present
Maximum pressure (CIP): 19,000 psi (130 MPa)
Place of origin: Austria; United States