What is .17 mach 4?

.17 Mach 4 is a small-caliber, high-velocity rifle cartridge that was developed by the wildcatter Steve Johnson in the late 1990s. It is based on the .221 Remington Fireball case that has been necked down to .17 caliber diameter.

The .17 Mach 4 has a very fast muzzle velocity of about 3,800 feet per second, which makes it an extremely flat-shooting and accurate cartridge over long distances. It is primarily used for varmint hunting and target shooting, but is also suitable for small game hunting.

The .17 Mach 4 has a relatively low recoil, which makes it easy to shoot accurately and quickly. It also has a high ballistic coefficient, which means that it retains its velocity and energy over long distances and delivers a high level of accuracy and terminal performance.

Overall, the .17 Mach 4 is a high-performance cartridge that offers extreme flatness, accuracy, and terminal performance for small game hunting and target shooting.