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45 GAP Ammo Uses & Background

The .45 GAP (Glock Automatic Pistol) was introduced in 2003. As the name suggests, it was developed by CCI/Speer at the suggestion of Glock. The .45 GAP differs from its closest competitor, the .45 ACP, in its use of a shorter 9mm length case reinforced to accomodate higher pressures (comparable to those found in +P loads of the older .45) and prevent catastrophic malfunctions. This form factor change allows the .45 GAP to fit in smaller Glock frames and magazines originally designed for 9mm Parabellum handguns.

Glock models firing .45 GAP ammo include the Glock 37, 38, and 39. These pistols are generally less bulky and more comfortable to handle than their .45 ACP counterparts for many shooters, fulfilling the design intent of the .45 GAP. Users of .45 GAP handguns include the state highway patrols of South Carolina and Florida as well as the state police force of New York.

Many .45 GAP loads fire bullets in the 185-230 grain range popular for the .45 Auto; however, 200 grains is a common middle ground. With a muzzle velocity of 900 to 1,150 feet per second, the .45 GAP delivers strong terminal performance at close range.

Being intended for defense or law enforcement use, .45 GAP ammo typically comes with inexpensive full metal jacket (FMJ) bullets for training and more expensive JHP (jacketed hollow point) projectiles for real-world carry. Speer Gold Dot hollow points are widely used by police, with Lawman target ammo serving as an affordable range alternative that produces the same handling characteristics.