Load data for 7.21 Firebird + 145gr Speer Boat-Tail
334 suitable loads across 55 powder(s) for cartridge 7.21 Firebird with 145gr Speer Boat-Tail bullet.
The most recommended powders for this combination are ADI AR 2218, Hodgdon Retumbo and Vihtavuori N570.
Based on C.I.P., the max. allowed case length is 2.810 in / 71.37 mm, the max. cartridge length is 3.630 in / 92.20 mm, and the max. allowed pressure is 66,717 PSI / 4,600 bar.
Based on C.I.P., the max. allowed case length is 2.810 in / 71.37 mm, the max. cartridge length is 3.630 in / 92.20 mm, and the max. allowed pressure is 66,717 PSI / 4,600 bar.
Load Specifications
ImperialMetric
Bullet:.284 | 145gr | Boat-Tail
Cartridge:7.21 Firebird load data
Case Length (L3):2.800" | 71.1 mm
Cartridge Length (COL/L6):•••
Seated Depth:0.468" | 11.9 mm
Case Capacity:121 gow | 7.84 cm³
Primer Size:Large Rifle Magnum (LRM)
Max. Pressure (C.I.P.):66,717 psi | 4,600 bar
Barrel Length:26.0" | 660 mm
Min. Twist Rate:1:12.0
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