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Rifles, Reloading, Optics, Equipment
Reloading
6.5 Creedmoor Jump
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<blockquote data-quote="Mikecr" data-source="post: 2213062" data-attributes="member: 1521"><p>2.225 - 0.020 OTL is 2.205"</p><p>That's longer than your magazine limited CBTO of 2.110", so if your going to use the magazine then you might as well forget 20thou OTL.</p><p></p><p>You should back off powder to around 38gr and run the Berger recommended seating depth testing from 2.110. </p><p>This is far larger coarse increments to get you into the right zip code at least.</p><p>3sht grouping at each increment should be bad, but EASY for seeing best of coarse CBTO.</p><p>Then work with powder again.</p><p>Then with best coarse seating, and best powder load, fine tweak seating for tightest grouping.</p><p></p><p>If your results are no good, consider your primer or it's striking as a potential issue.</p><p>Back off on powder again, swap primer brands for best 3sht grouping, work powder back to best load.</p><p>This while at previous determined best seating (you're forever past that).</p><p>One of the primers may bring things together, and you could also do this while previously backed off for seating testing.</p><p>It removes any primer question.</p><p></p><p>These actions assume you do not have some issue impeding results. Something broken or bad..</p><p>An honest 1/2moa is hard to expect until knowing you really have EVERYTHING right.</p></blockquote><p></p>
[QUOTE="Mikecr, post: 2213062, member: 1521"] 2.225 - 0.020 OTL is 2.205" That's longer than your magazine limited CBTO of 2.110", so if your going to use the magazine then you might as well forget 20thou OTL. You should back off powder to around 38gr and run the Berger recommended seating depth testing from 2.110. This is far larger coarse increments to get you into the right zip code at least. 3sht grouping at each increment should be bad, but EASY for seeing best of coarse CBTO. Then work with powder again. Then with best coarse seating, and best powder load, fine tweak seating for tightest grouping. If your results are no good, consider your primer or it's striking as a potential issue. Back off on powder again, swap primer brands for best 3sht grouping, work powder back to best load. This while at previous determined best seating (you're forever past that). One of the primers may bring things together, and you could also do this while previously backed off for seating testing. It removes any primer question. These actions assume you do not have some issue impeding results. Something broken or bad.. An honest 1/2moa is hard to expect until knowing you really have EVERYTHING right. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
6.5 Creedmoor Jump
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