Tim Sundles from Buffalo Bore puts two of HK’s toughest .45-caliber handguns, the Mark 23 and the USP Tactical, through their paces with .45 Super ammunition. He explains why these pistols stand out as some of the only factory-stock semi-autos that can reliably handle .45 Super pressures, discusses their strengths for outdoor carry and defense, and compares performance, recoil, and accuracy between the two. Then he takes both pistols outside for a live-fire test.