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Rifles, Reloading, Optics, Equipment
Reloading
Breaking in 300 win mag
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<blockquote data-quote="J E Custom" data-source="post: 319777" data-attributes="member: 2736"><p>The 215s may be to hot for the 300WM and I would recomend trying a 9 1/2 m Remington</p><p>primer or even a standard large rifle primer.</p><p></p><p>I have had the same thing happen to me with cases that hold 70 to 80 grains of powder .</p><p></p><p>They were faster with the 215s but the SDs were poor so I tried the 9 1/2 Ms and lost a </p><p>little velocity but reduced the standard deviation's by almost half.</p><p></p><p>The bigger cases (100+) grains of capacity do better with the 215 or 215ms.</p><p></p><p>Also H 4831sc is a great powder for the 300 WM.</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 319777, member: 2736"] The 215s may be to hot for the 300WM and I would recomend trying a 9 1/2 m Remington primer or even a standard large rifle primer. I have had the same thing happen to me with cases that hold 70 to 80 grains of powder . They were faster with the 215s but the SDs were poor so I tried the 9 1/2 Ms and lost a little velocity but reduced the standard deviation's by almost half. The bigger cases (100+) grains of capacity do better with the 215 or 215ms. Also H 4831sc is a great powder for the 300 WM. J E CUSTOM [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Breaking in 300 win mag
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