.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	22,7 g / 350 gr		Hornady, RN		C.O.L. 74,9 mm / 2.949 inch
Powder	Starting load				Maximum load
Type	Weight		Velocity		Weight		Velocity
	[g]	[grs]	[m/s]	[fps]	[g]	[grs]	[m/s]	[fps]
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
F – Case full
Bullet	25,9 g / 400 gr		Barnes, XFB		C.O.L. 83,0 mm / 3.268 inch
Powder	Starting load				Maximum load
Type	Weight		Velocity		Weight		Velocity
	[g]	[grs]	[m/s]	[fps]	[g]	[grs]	[m/s]	[fps]
N130	4,00	61.7	631	2070	4,36	67.3	688	2257
N530	4,50	69.4	645	2116	4,70F	72.5F	674	2211
N135	4,30	66.3	625	2051	4,42F	68.2F	644	2113
F – Case full
Bullet	25,9 g / 400 gr		Swift, A-Frame		C.O.L. 82,0 mm / 3.228 inch
Powder	Starting load				Maximum load
Type	Weight		Velocity		Weight		Velocity
	[g]	[grs]	[m/s]	[fps]	[g]	[grs]	[m/s]	[fps]
N130	4,30	66.3	674	2211	4,55	70.2	710	2329
N530	4,90	75.6	691	2267	5,10F	78.7F	722	2369
N135	4,80	74.1	677	2221	4,90F	75.6F	692	2270
F – Case full
Bullet	32,4 g / 500 gr		Hornady, RN		C.O.L. 84,0 mm / 3.307 inch
Powder	Starting load				Maximum load
Type	Weight		Velocity		Weight		Velocity
	[g]	[grs]	[m/s]	[fps]	[g]	[grs]	[m/s]	[fps]
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

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