Load data for .257 Ackley Improved + 90gr Prvi Partizan HP
269 suitable loads across 52 powder(s) for cartridge .257 Ackley Improved with 90gr Prvi Partizan HP bullet.
The most recommended powders for this combination are Somchem S365, Hodgdon Hybrid 100V and Winchester 6.5 StaBALL.
Based on Wildcat, the max. allowed case length is 2.233 in / 56.72 mm, the max. cartridge length is 2.775 in / 70.49 mm, and the max. allowed pressure is 48,200 PSI / 3,323 bar.
Based on Wildcat, the max. allowed case length is 2.233 in / 56.72 mm, the max. cartridge length is 2.775 in / 70.49 mm, and the max. allowed pressure is 48,200 PSI / 3,323 bar.
Load Specifications
ImperialMetric
Bullet:.257 | 90gr | HP
Cartridge:.257 Ackley Improved load data
Case Length (L3):2.333" | 59.3 mm
Cartridge Length (COL/L6):•••
Seated Depth:0.485" | 12.3 mm
Case Capacity:63 gow | 4.08 cm³
Primer Size:Large Rifle (LR)
Max. Pressure (Wildcat):48,200 psi | 3,323 bar
Barrel Length:24.0" | 610 mm
Min. Twist Rate:1:13.0
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