.221 Remington Fireball

.221 Remington Fireball
TypePistol / Rifle
Place of originUnited States
Production history
DesignerRemington / Wayne Leek
ManufacturerRemington
Produced1963
Specifications
Parent case.222 Remington
Case typeRimless, bottleneck
Bullet diameter.224 in (5.7 mm)
Neck diameter.253 in (6.4 mm)
Shoulder diameter.361 in (9.2 mm)
Base diameter.376 in (9.6 mm)
Rim diameter.378 in (9.6 mm)
Rim thickness.045 in (1.1 mm)
Case length1.400 in (35.6 mm)
Overall length1.830 in (46.5 mm)
Rifling twist1-12 in (300 mm)
Primer typeSmall rifle
Maximum CUP52,000 CUP
Ballistic performance
Bullet mass/type Velocity Energy
45 gr (2.9 g) SP – Pistol 2,947 ft/s (898 m/s) 868 ft⋅lbf (1,177 J)
50 gr (3.2 g) SX – Pistol 2,813 ft/s (857 m/s) 879 ft⋅lbf (1,192 J)
55 gr (3.6 g) SBT – Pistol 2,700 ft/s (820 m/s) 891 ft⋅lbf (1,208 J)
45 gr (2.9 g) SP – Rifle 3,203 ft/s (976 m/s) 1,025 ft⋅lbf (1,390 J)
55 gr (3.6 g) SBT – Rifle 2,950 ft/s (900 m/s) 1,063 ft⋅lbf (1,441 J)
Test barrel length: 14 in (360 mm), 24 in (610 mm)
Source(s): Accurate Powder

The .221 Remington Fireball (5.7x35mm), often simply referred to as .221 Fireball, is a centerfire cartridge created by Remington Arms Company in 1963 as a special round for use in their experimental single-shot bolt-action pistol, the XP-100. A shortened version of the .222 Remington, it is popular as a varmint and small predator round while also finding use among target shooters. It has application as both a pistol round and as a rifle round.

This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.