The .17 Remington Fireball / 4.4x36mm was created in 2007 by Remington Arms Company as a response to the popular wildcat round, the .17 Mach IV.

Factory loads drive a 20 grain (1.3 g) bullet around 4,000 ft/s (1,219 m/s).

Velocity is close to the .17 Remington but with significantly less powder, and therefore less heat and fouling.

Both are important issues to high-volume shooters such as varmint hunters.

It is based on the .221 Remington Fireball necked down to accept a .17 caliber bullet and is very similar to the .17 Mach IV.