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Rifles, Reloading, Optics, Equipment
Reloading
Powder charge and seating depth
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<blockquote data-quote="QuietTexan" data-source="post: 2436072" data-attributes="member: 116181"><p>Is this in your Savage AR? Because there are two discussions here, the theory of how changing seating depth impacts pressure and timing, and the practical of what's actually happening with your current load.</p><p></p><p>In theory yes, moving a seating depth 0.040" could be enough to make an impact on pressure and muzzle velocity stats of ES/SD. Minor tweaking of 0.010" one way or the other might not push you out of a node.</p><p></p><p>Sounds like you already ran some loads seated progressively slightly longer from the book COL and groups opened up. This is a small case but also a small bullet, seating depth changes case volume more on large bullets/small cases. So in the specific case of your AR I'm not sure you could move the heavy bullets (70gn+ right?) you're shooting out long enough to feed to get to 0.020" off, so are you trying to do this just to find out? Or would you be ok single feeding to run the load?</p></blockquote><p></p>
[QUOTE="QuietTexan, post: 2436072, member: 116181"] Is this in your Savage AR? Because there are two discussions here, the theory of how changing seating depth impacts pressure and timing, and the practical of what's actually happening with your current load. In theory yes, moving a seating depth 0.040" could be enough to make an impact on pressure and muzzle velocity stats of ES/SD. Minor tweaking of 0.010" one way or the other might not push you out of a node. Sounds like you already ran some loads seated progressively slightly longer from the book COL and groups opened up. This is a small case but also a small bullet, seating depth changes case volume more on large bullets/small cases. So in the specific case of your AR I'm not sure you could move the heavy bullets (70gn+ right?) you're shooting out long enough to feed to get to 0.020" off, so are you trying to do this just to find out? Or would you be ok single feeding to run the load? [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Powder charge and seating depth
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