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Rifles, Reloading, Optics, Equipment
Reloading
Your Load Development Method ⚖️
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<blockquote data-quote="nksmfamjp" data-source="post: 2655743" data-attributes="member: 1951"><p>My method:</p><p>Find max oal, into lands, mag length, into lands minus something….then load with it to start.</p><p>1) a ladder to find bolt lift shot 1 round per charge into separate bullseyes….find groupings and flat spots in velocity curves. At bolt lift or click, that Is over max and I back off 0.5 - 1gr.</p><p></p><p>2) 5 shot groups at different charge weights….look for best groups and best sd. Fine tune until decent sd is found. Group is #2 priority.</p><p></p><p>3) 3 shot groups at max oal back in 0.005" increments…go back to 0.150" if you have to in order to see groups open and tighten. Select tightest group.</p><p></p><p>If this isn't pretty darn good, it is likely time to start over with a new bullet.</p><p></p><p>4) Starting at your current charge weight, shoot 2-3 weights above and below it looking for a combination of best accuracy and sd….5 shot groups….</p><p></p><p>Fine tune as needed…this is the time to try more and less neck tension, look for bad cases, look at runout, consider a short development skipping #3(because you know the right oal) trying an alternate powder or primer, etc.</p></blockquote><p></p>
[QUOTE="nksmfamjp, post: 2655743, member: 1951"] My method: Find max oal, into lands, mag length, into lands minus something….then load with it to start. 1) a ladder to find bolt lift shot 1 round per charge into separate bullseyes….find groupings and flat spots in velocity curves. At bolt lift or click, that Is over max and I back off 0.5 - 1gr. 2) 5 shot groups at different charge weights….look for best groups and best sd. Fine tune until decent sd is found. Group is #2 priority. 3) 3 shot groups at max oal back in 0.005" increments…go back to 0.150" if you have to in order to see groups open and tighten. Select tightest group. If this isn't pretty darn good, it is likely time to start over with a new bullet. 4) Starting at your current charge weight, shoot 2-3 weights above and below it looking for a combination of best accuracy and sd….5 shot groups…. Fine tune as needed…this is the time to try more and less neck tension, look for bad cases, look at runout, consider a short development skipping #3(because you know the right oal) trying an alternate powder or primer, etc. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Your Load Development Method ⚖️
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