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Rifles, Reloading, Optics, Equipment
Reloading
Determining a load
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<blockquote data-quote="nksmfamjp" data-source="post: 3039320" data-attributes="member: 1951"><p>Find a start load. Set OAL to lands minus 0.030", max mag length or bullet bearing surface limit even with base of neck….in that order of priority. </p><p></p><p>Shoot a 0.5-1.0% increment ladder test until you find pressure. Bolt lift, ejector marks, etc. Back off 1-2%. Load 25. Shoot over chrono into 5 groups. Measure velocity, sd, each group size and a composite group size.</p><p></p><p>Good enough? Stop.</p><p></p><p>If not, try OCW type methods to fine tune oal off lands. Like 0.020"-0.1".</p></blockquote><p></p>
[QUOTE="nksmfamjp, post: 3039320, member: 1951"] Find a start load. Set OAL to lands minus 0.030”, max mag length or bullet bearing surface limit even with base of neck….in that order of priority. Shoot a 0.5-1.0% increment ladder test until you find pressure. Bolt lift, ejector marks, etc. Back off 1-2%. Load 25. Shoot over chrono into 5 groups. Measure velocity, sd, each group size and a composite group size. Good enough? Stop. If not, try OCW type methods to fine tune oal off lands. Like 0.020”-0.1”. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Determining a load
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