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Rifles, Reloading, Optics, Equipment
Reloading
Hard bolt pull?
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<blockquote data-quote="AZShooter" data-source="post: 1923850" data-attributes="member: 5219"><p>Read the entire thread. </p><p></p><p>You have used the brass for four firings with Gunwerks brass. You might want to retire the brass for now and try another brand.. Lapua would be my first choice. If you do be sure to start low and work up again as internal volume could be different. </p><p></p><p></p><p>A few posters suggested annealing the brass. Unless I am mistaken annealing is used on the case neck, never on the body so don't know how this would help. </p><p></p><p>Three or four times fired brass will be work hardened near web preventing it from springing back. It is more prevalent with certain brands of brass or some chamberings. I have noticed that WSM, RCM and RUM brass uses thicker case walls which aggravates this issue. </p><p></p><p>IMO the diameter of the chamber near the web and the diameter of the sizing die at same location does not have a great enough difference. Either get a small base die or make one. OR polish the rear of chamber to make it slightly larger. Either way will increase the difference in diameters. </p><p></p><p>Did a quick search and found a RCBS small base die</p><p></p><p>[URL unfurl="true"]https://precisionreloading.com/cart.php#!l=RC&i=32931[/URL]</p><p></p><p> BUT there is an issue:</p><p>" These dies size the body of cases somewhat smaller in diameter and <strong>also sets the shoulder back slightly more than a Full-Length Sizer Die</strong> to ensure proper functioning in the actions of these rifles. Not recommended for ammunition used in bolt-action rifles." </p><p></p><p>So you either go to someone like Whidden and request a special die or make one. I have used a carbide tool bit to cut through RCBS's case hardened FL die on my lathe. Some material is removed from the top and bottom creating a custom small base die. It solved the issue with my two 338 RCMs and 300 RUM with brass that was fired more than two times.</p></blockquote><p></p>
[QUOTE="AZShooter, post: 1923850, member: 5219"] Read the entire thread. You have used the brass for four firings with Gunwerks brass. You might want to retire the brass for now and try another brand.. Lapua would be my first choice. If you do be sure to start low and work up again as internal volume could be different. A few posters suggested annealing the brass. Unless I am mistaken annealing is used on the case neck, never on the body so don't know how this would help. Three or four times fired brass will be work hardened near web preventing it from springing back. It is more prevalent with certain brands of brass or some chamberings. I have noticed that WSM, RCM and RUM brass uses thicker case walls which aggravates this issue. IMO the diameter of the chamber near the web and the diameter of the sizing die at same location does not have a great enough difference. Either get a small base die or make one. OR polish the rear of chamber to make it slightly larger. Either way will increase the difference in diameters. Did a quick search and found a RCBS small base die [URL unfurl="true"]https://precisionreloading.com/cart.php#!l=RC&i=32931[/URL] BUT there is an issue: " These dies size the body of cases somewhat smaller in diameter and [B]also sets the shoulder back slightly more than a Full-Length Sizer Die[/B] to ensure proper functioning in the actions of these rifles. Not recommended for ammunition used in bolt-action rifles." So you either go to someone like Whidden and request a special die or make one. I have used a carbide tool bit to cut through RCBS's case hardened FL die on my lathe. Some material is removed from the top and bottom creating a custom small base die. It solved the issue with my two 338 RCMs and 300 RUM with brass that was fired more than two times. [/QUOTE]
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