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Rifles, Reloading, Optics, Equipment
Reloading
7mm Rem. Mag.....what primer?
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<blockquote data-quote="backwoods83" data-source="post: 758057" data-attributes="member: 29890"><p>CCI primers have a harder cup than the others, hard enough to damage the firing? Not even close, they actually work better in some full pressure loads because they don't flow or flatten causing the primer pockets to enlarge like Fed and Win primers will, remington primers are second in line for the hardness of the cup.</p><p>Anyway here is what I have found with the 7mm in 24-26" barrels</p><p>Imr4350 CCI BR2</p><p>Imr4831 Fed210M or WLR almost identical results</p><p>H4831 Fed210M or CCI250 almost identical here as well</p><p>RE22 WLR or CCI 250 when using less than 65grns</p><p>Imr7828 Fed210M or CCI 250</p><p>H1000 WLR or CCI250, Fed215Ms are good if using over 72grns</p><p>Retumbo 215Ms all the way and for 160grn pills and heavier this combo burns better than H1000 in the shorter barrels, H4831 still wins in the extreme spread category, but Retumbo is close and can net 75fps or so more velocity than H4831.</p></blockquote><p></p>
[QUOTE="backwoods83, post: 758057, member: 29890"] CCI primers have a harder cup than the others, hard enough to damage the firing? Not even close, they actually work better in some full pressure loads because they don't flow or flatten causing the primer pockets to enlarge like Fed and Win primers will, remington primers are second in line for the hardness of the cup. Anyway here is what I have found with the 7mm in 24-26" barrels Imr4350 CCI BR2 Imr4831 Fed210M or WLR almost identical results H4831 Fed210M or CCI250 almost identical here as well RE22 WLR or CCI 250 when using less than 65grns Imr7828 Fed210M or CCI 250 H1000 WLR or CCI250, Fed215Ms are good if using over 72grns Retumbo 215Ms all the way and for 160grn pills and heavier this combo burns better than H1000 in the shorter barrels, H4831 still wins in the extreme spread category, but Retumbo is close and can net 75fps or so more velocity than H4831. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
7mm Rem. Mag.....what primer?
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