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Rifles, Reloading, Optics, Equipment
Reloading
shoulder bumping
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<blockquote data-quote="Bart B" data-source="post: 116293" data-attributes="member: 5302"><p>[ QUOTE ]</p><p>when i was shooting the groups,if the cases went in to the chamber with out it feeling hard to close the bolt,they shot in to .3 3 shot group @ 100 if the bolt was hard to close they shot about 1/2" away,high and to the right, did yours do this as well Bart?????</p><p></p><p>[/ QUOTE ]Yes; I've never got good accuracy from any tight fitting case in the chamber that requires more force to close the bolt than an empty chamber needs. There's several reasons why this happens but I believe they're all caused by different pressure points on the bolt face before the round's fired. Full-length sized cases with shoulders set back a bit have never had this problem and they've always shot more accurate. And I've got from 50 to over 80 reloads per case using normal maximum powder charges this way. Hot loads will shorten case life and usually accuracy, too.</p></blockquote><p></p>
[QUOTE="Bart B, post: 116293, member: 5302"] [ QUOTE ] when i was shooting the groups,if the cases went in to the chamber with out it feeling hard to close the bolt,they shot in to .3 3 shot group @ 100 if the bolt was hard to close they shot about 1/2" away,high and to the right, did yours do this as well Bart????? [/ QUOTE ]Yes; I've never got good accuracy from any tight fitting case in the chamber that requires more force to close the bolt than an empty chamber needs. There's several reasons why this happens but I believe they're all caused by different pressure points on the bolt face before the round's fired. Full-length sized cases with shoulders set back a bit have never had this problem and they've always shot more accurate. And I've got from 50 to over 80 reloads per case using normal maximum powder charges this way. Hot loads will shorten case life and usually accuracy, too. [/QUOTE]
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