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Rifles, Reloading, Optics, Equipment
Reloading
7mm Remington Magnum dies
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<blockquote data-quote="entoptics" data-source="post: 2183336" data-attributes="member: 104268"><p>Two important things that have been danced around in the replies, but not fully addressed...</p><p></p><p>1) Forget about SAAMI base to shoulder. Forget about virgin brass base to shoulder. The only measurements that matter here are the base to shoulder measurement for 1X-2X fired brass from each rifle.</p><p></p><p>2) DO NOT size the brass more than enough to bump the shoulder ~0.002" ± 0.001". You will get incipient head separation after 2-3 firings at most, and full on case separations by 3rd or 4th firing if you size them more than a couple thousandths.</p><p></p><p>In summary, unless you get lucky, there's usually enough difference between chambers, that sharing brass and loads is difficult. I loaded for two identical Savage Long Range Hunters in 300WM, and they had 0.008" difference between base to shoulder, and 0.010" difference in base to ogive. Had I chosen to attempt to share brass between them, and bumped 0.002" back on the shorter of the two, the brass would have been 0.010" BTS for the longer rifle, and would have probably separated after a few firings in the longer chamber.</p><p></p><p>Usually, the only time you can get away with sharing is on virgin brass. After that first firing, it's time to keep stuff separate.</p></blockquote><p></p>
[QUOTE="entoptics, post: 2183336, member: 104268"] Two important things that have been danced around in the replies, but not fully addressed... 1) Forget about SAAMI base to shoulder. Forget about virgin brass base to shoulder. The only measurements that matter here are the base to shoulder measurement for 1X-2X fired brass from each rifle. 2) DO NOT size the brass more than enough to bump the shoulder ~0.002" ± 0.001". You will get incipient head separation after 2-3 firings at most, and full on case separations by 3rd or 4th firing if you size them more than a couple thousandths. In summary, unless you get lucky, there's usually enough difference between chambers, that sharing brass and loads is difficult. I loaded for two identical Savage Long Range Hunters in 300WM, and they had 0.008" difference between base to shoulder, and 0.010" difference in base to ogive. Had I chosen to attempt to share brass between them, and bumped 0.002" back on the shorter of the two, the brass would have been 0.010" BTS for the longer rifle, and would have probably separated after a few firings in the longer chamber. Usually, the only time you can get away with sharing is on virgin brass. After that first firing, it's time to keep stuff separate. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
7mm Remington Magnum dies
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