Vihtavuori Load Data - 221 Rem Fireball
The .221 Remington Fireball, often simply referred to as .221 Fireball, is a centrefire 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.
Despite its smaller size, the .221 Fireball is capable of velocities nearly equal to that of the .222 Remington largely due to its higher SAAMI pressure. The maximum SAAMI pressure level for the .221 Fireball is 52,000 C.U.P. as compared to 46,000 C.U.P. for the .222 Remington. The purpose of the increased pressure was to allow it to perform more effectively in the shorter barrel of the XP-100.
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