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. Reports on this cartridge show mild recoil, high velocity, with minimal report (noise).[2]
.17 Remington Fireball cartridge next to a .221 Remington Fireball cartridge, its parent case
.17 Remington Fireball cartridge next to a .17 Remington cartridge
Left to right - .223 Rem, .17 Rem, .17 Fireball cases
