Product Type | Ammo |
---|---|
Manufacturer | Remington |
Condition | New |
Bullet Weight | 55 Grain |
Bullet Type | Full Metal Jacket (FMJ) |
Ammo Casing | Brass |
Quantity | 300 |
Ammo Caliber | .223 Remington |
Manufacturer SKU | L223R3BC |
Primer Type | Boxer |
Muzzle Velocity (fps) | 3240 |
Muzzle Energy (ft lbs) | 1282 |
Attracts Magnet | No |
UPC Barcode | 47700471402 |
Cost Per Round | 56.7¢ per round |
The twist rate on a .223 Rem out of a bolt action rifle is 1:12 and is between 1:7 and 1:9 out of most semi-automatic rifles, depending on the make and model. The 1:7 twist rate is extremely tight and fast. It was designed to improve accuracy of the 5.56 NATO penetrator ammunition that weighs 62 grains. The AR-15 with a 1:8 or 1:9 should be sufficient for accuracy with these 55 grain rounds.