.458 Winchester Magnum

Test barrel: 635 mm (25”), 1 in 14” twist
Primers: Large Rifle Magnum
Cases: Winchester, trim-to length 63,30 mm (2.492”)
 
Bullet22,7 g / 350 grRN, HornadyC.O.L. 74,9 mm / 2.949 inch
PowderStarting loadMaximum load
TypeWeightVelocityWeightVelocity
[g][grs][m/s][fps][g][grs][m/s][fps]
N1204,1363.771223364,5369.97482454
N1304,4668.873023954,8074.17732536
N1334,7272.873023954,90F75.6F7562480
F – Case full
 
Bullet25,9 g / 400 grA-Frame, SwiftC.O.L. 82,0 mm / 3.228 inch
PowderStarting loadMaximum load
TypeWeightVelocityWeightVelocity
[g][grs][m/s][fps][g][grs][m/s][fps]
N1304,3066.367422114,5570.27102329
N1354,8074.167722214,90F75.6F6922270
N5304,9075.669122675,10F78.7F7222369
F – Case full
 
Bullet25,9 g / 400 grXFB, BarnesC.O.L. 83,0 mm / 3.268 inch
PowderStarting loadMaximum load
TypeWeightVelocityWeightVelocity
[g][grs][m/s][fps][g][grs][m/s][fps]
N1304,0061.763120704,3667.36882257
N1354,3066.362520514,42F68.2F6442113
N5304,5069.464521164,70F72.5F6742211
F – Case full
 
Bullet32,4 g / 500 grRN, HornadyC.O.L. 84,0 mm / 3.307 inch
PowderStarting loadMaximum load
TypeWeightVelocityWeightVelocity
[g][grs][m/s][fps][g][grs][m/s][fps]
N1303,6055.555718274,1163.46232044
N1333,8559.456418504,5269.76452116
N5304,2064.858919324,7673.46552149