my first attempt at bullet testing, i am shooting the 230 grain nonp Federal HST .45 acp hollow point through my officers STI Spartan İ 1911 with a 3.24 inch .brMy plans for the DoubleTap included the pistol working with my standard carry ammo. This three shot quick test gave me a pretty good idea that this wasnt going .brJug and barrel test of the 230 Gr. JHP in .45 ACPP (AUTO) HST by Federal with a caliber comparison.brTest Gun: Springfield XDm .45 4.5 Barrel Penetration: 4 Layers DenimHog Head3 Jugs Velocity: 930 FPS441 FT-LBS Expansion: .696 Retained Weight .