45 Hole ammunition was Primarily suitable for Glock and "Hole" truly stands for "Glock Computerized Pistol". Engineer Ernest Durham developed the 45 GAP round being a cartridge that would be as strong as forty five ACP but would've a stronger scenario head to decrease the prospect that the situation's neck https://tacticalrounds.com/product/1000-rounds-of-45-acp-ammo-by-speer-lawman-clean-fire-230gr-tmj/