Load data for .256 Mag. Gibbs + 100gr Swift Scirocco
326 suitable loads across 64 powder(s) for cartridge .256 Mag. Gibbs with 100gr Swift Scirocco bullet.
The most recommended powders for this combination are Somchem S365, Alliant Reloder-17 and Alliant Reloder-16.
Based on C.I.P., the max. allowed case length is 2.175 in / 55.25 mm, the max. cartridge length is 3.050 in / 77.47 mm, and the max. allowed pressure is 49,313 PSI / 3,400 bar.
Based on C.I.P., the max. allowed case length is 2.175 in / 55.25 mm, the max. cartridge length is 3.050 in / 77.47 mm, and the max. allowed pressure is 49,313 PSI / 3,400 bar.
Load Specifications
ImperialMetric
Bullet:.257 | 100gr | Scirocco
Cartridge:.256 Mag. Gibbs load data
Case Length (L3):2.173" | 55.2 mm
Cartridge Length (COL/L6):•••
Seated Depth:0.336" | 8.5 mm
Case Capacity:56 gow | 3.63 cm³
Primer Size:Large Rifle (LR)
Max. Pressure (C.I.P.):49,313 psi | 3,400 bar
Barrel Length:24.0" | 610 mm
Min. Twist Rate:1:9.5
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