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Rifles, Reloading, Optics, Equipment
Reloading
Help a gal with load development-seating depth
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<blockquote data-quote="30calyooper" data-source="post: 1743519" data-attributes="member: 107258"><p>Cody's advice is spot on.</p><p></p><p>The other and sometimes simpler method (but often not quite as precise) is to simply use the COAL listed in the reloading manual, tweak to find the best powder charge weight for accuracy with your chosen combo of brass-primer-powder, then play with seating depth in .010" increments. The catch with this method is that as you move the bullet outward (longer COAL) you have to watch two things - </p><p>1) be sure it fits in your magazine; and </p><p>2) as the bullet moves out, you may notice a tendency to see the velocity drop. If it's not significant and the accuracy is improving, then you're gaining. But obviously, DO NOT take it out to the point that you begin to experience difficulty closing the bolt. (I know, sounds pretty obvious, but I'm surprised by how many people relatively new to handloading have walked past this important point then wondered why they were experiencing pressure spikes...)</p><p></p><p>Now you may already have experienced this - but as you move the bullet outward and create more space in the combustion chamber and see a drop in velocity as described above, you may find yourself considering the the idea of raising the powder charge by a slight increment such as 0.1 grain. That's okay if you're CAREFULLY watching for pressure signs, but it may also set you back to square one as you've now altered your recipe.</p></blockquote><p></p>
[QUOTE="30calyooper, post: 1743519, member: 107258"] Cody's advice is spot on. The other and sometimes simpler method (but often not quite as precise) is to simply use the COAL listed in the reloading manual, tweak to find the best powder charge weight for accuracy with your chosen combo of brass-primer-powder, then play with seating depth in .010" increments. The catch with this method is that as you move the bullet outward (longer COAL) you have to watch two things - 1) be sure it fits in your magazine; and 2) as the bullet moves out, you may notice a tendency to see the velocity drop. If it's not significant and the accuracy is improving, then you're gaining. But obviously, DO NOT take it out to the point that you begin to experience difficulty closing the bolt. (I know, sounds pretty obvious, but I'm surprised by how many people relatively new to handloading have walked past this important point then wondered why they were experiencing pressure spikes...) Now you may already have experienced this - but as you move the bullet outward and create more space in the combustion chamber and see a drop in velocity as described above, you may find yourself considering the the idea of raising the powder charge by a slight increment such as 0.1 grain. That's okay if you're CAREFULLY watching for pressure signs, but it may also set you back to square one as you've now altered your recipe. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Help a gal with load development-seating depth
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