Forty five Hole ammunition was Specifically designed for Glock and "Hole" in fact means "Glock Automatic Pistol". Engineer Ernest Durham developed the 45 Hole round to be a cartridge that would be as powerful as forty five ACP but would've a stronger situation head to decrease the prospect that the https://tacticalrounds.com/product-category/best-rifle-ammo/5-45x39mm-ammo/