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Rifles, Reloading, Optics, Equipment
Reloading
Shoulder bump on 280 Ackley problem....
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<blockquote data-quote="MagnumManiac" data-source="post: 2909416" data-attributes="member: 10755"><p>Here's the thing, the 40° shoulder is very good at resisting the bump and, when you do bump, the shoulder springs back MORE. The same thing happens with Weatherby shoulders, maybe .001" more of sizing is necessary as measured to get the desired results.</p><p>I had head scratching with 2 of my rounds at first, the 257AI and 375 Weatherby, both were measured, dies set and nothing, cases GREW in length…had to turn .010" off the shell holders to get desired results, as both are 'match grade' chambers at minimum SAAMI/CIP Spec.</p><p></p><p>Cheers.</p></blockquote><p></p>
[QUOTE="MagnumManiac, post: 2909416, member: 10755"] Here’s the thing, the 40° shoulder is very good at resisting the bump and, when you do bump, the shoulder springs back MORE. The same thing happens with Weatherby shoulders, maybe .001” more of sizing is necessary as measured to get the desired results. I had head scratching with 2 of my rounds at first, the 257AI and 375 Weatherby, both were measured, dies set and nothing, cases GREW in length…had to turn .010” off the shell holders to get desired results, as both are ‘match grade’ chambers at minimum SAAMI/CIP Spec. Cheers. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Shoulder bump on 280 Ackley problem....
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