A 2004 joint rimfire cartridge development between Hornady and CCI, the .17 Mach 2 cartridge delivers higher velocities and flatter trajectories than the .22 Long Rifle cartridge. Hornady designed the .17 Mach 2 for plinking, varminting, and small-game hunting. In quality firearms, the .17 Mach 2 is capable of MOA or better accuracy.
The .17 Mach 2 is not reloadable. It uses the rimfire .22 Stinger case as its parent. Exactly.100-inch longer than the .22 Long Rifle case, the Stinger case is necked down to accept .172-inch diameter bullets weighing 17 grains. The .17 Mach 2 is well-suited to 18/22-inch barrels with a 1:9-inch twist. Ruger, Marlin, Thompson/Center, and other manufacturers offer rifles chambered for the .17 Mach 2. Hornady, CCI, Remington, and Eley supply loaded information. Hornady offers the…