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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Developing a new load, a few questions
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<blockquote data-quote="Grumulkin" data-source="post: 801333" data-attributes="member: 29281"><p>I don't use a chronograph to work up a load and I don't try to get to some magic velocity. What I go for is best accuracy.</p><p></p><p>As for pressure signs in a strong bolt action rifle:</p><p></p><p>1. If bolt lift is hard, you've gone too far.</p><p></p><p>2. If you get a pierced or blown primer you've gone way too far.</p><p></p><p>3. When you work up a load, accuracy generally gets better to a point as the load is in creased and then starts to deteriorate. The accuracy deterioration is a sign that you're past the optimal load and moving into excessive load territory. Many time there will also be a marked difference in where the load prints on paper when this point is reached.</p><p></p><p>4. If there is still a little roundness to the edge of the primer and none of the above apply, the load is probably OK.</p><p></p><p>5. If there is cratering of the primer the load is probably excessive or the hole for the firing pin is a bit bigger than necessary.</p></blockquote><p></p>
[QUOTE="Grumulkin, post: 801333, member: 29281"] I don't use a chronograph to work up a load and I don't try to get to some magic velocity. What I go for is best accuracy. As for pressure signs in a strong bolt action rifle: 1. If bolt lift is hard, you've gone too far. 2. If you get a pierced or blown primer you've gone way too far. 3. When you work up a load, accuracy generally gets better to a point as the load is in creased and then starts to deteriorate. The accuracy deterioration is a sign that you're past the optimal load and moving into excessive load territory. Many time there will also be a marked difference in where the load prints on paper when this point is reached. 4. If there is still a little roundness to the edge of the primer and none of the above apply, the load is probably OK. 5. If there is cratering of the primer the load is probably excessive or the hole for the firing pin is a bit bigger than necessary. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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Developing a new load, a few questions
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