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.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”)

Bullet Powder Starting load Maximum load
Weight Type Mfg C.O.L Type Weight Velocity Weight Velocity
[g] [grs]     [mm] [in.]   [g] [grs] [m/s] [fps] [g] [grs] [m/s] [fps]
22,7 350 RN Hornady 74,9 2.949 N120 4,13 63.7 712 2336 4,53 69.9 748 2454
            N130 4,46 68.8 730 2395 4,80 74.1 773 2536
            N133 4,72 72.8 730 2395 4,90F 75.6F 756 2480
25,9 400 XFB Barnes 83,0 3.268 N130 4,00 61.7 631 2070 4,36 67.3 688 2257
            N135 4,30 66.3 625 2051 4,42F 68.2F 644 2113
            N530 4,50 69.4 645 2116 4,70F 72.5F 674 2211
25,9 400 A-Frame Swift 82,0 3.228 N130 4,30 66.3 674 2211 4,55 70.2 710 2329
            N135 4,80 74.1 677 2221 4,90F 75.6F 692 2270
            N530 4,90 75.6 691 2267 5,10F 78.7F 722 2369
32,4 500 RN Hornady 84,0 3.307 N130 3,60 55.5 557 1827 4,11 63.4 623 2044
            N133 3,85 59.4 564 1850 4,52 69.7 645 2116
            N530 4,20 64.8 589 1932 4,76 73.4 655 2149

F = Case full

LIGHT GREY TEXT BOX INDICATES MAXIMUM LOAD - USE WITH CAUTION!
LOADS LESS THAN MINIMUM CHARGES SHOWN ARE NOT RECOMMENDED

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