According to an article written by Dick Metcalf in the May 2004 issue of Shooting Times magazine on Page 42 ...
- The new .45GAP (Glock Automatic Pistol) cartridge is more powerful than the .45ACP -- when fired side by side in pistols of the exact same barrel length with same-weight and same style 185-, 200-, and 230-grain bullets, the shorter case .45GAP develops an overall average of 8% more velocity and 14% more energy than the longer case .45ACP cartridge across the board.
- The .45GAP cartridge surpasses the .45ACP in every category of performance ... (in bold print on page 44)