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Rifles, Reloading, Optics, Equipment
Reloading
Newbie Load Development Question - How many rounds and how many grain increments?
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<blockquote data-quote="Bart B" data-source="post: 1143923" data-attributes="member: 5302"><p>I think Sierra's Mark Walker believes all 3-shot groups for a given load will be the same size. </p><p></p><p>Maybe he should tell that to the people testing their bullets during production runs and ask them to quit shooting several 10-shot groups. They don't work up a new load for different component lots nor a new test barrel.</p><p></p><p>His velocity numbers are not uniformly proportional to charge weight increments and that's not seen in vertical shot location. All bullets fired don't have the same BC so those leaving at the same speed won't have identical trajectories as proved in his 3-shot groups. I'd bet his ladder test would yield different results if repeated. Good tests of anything are so proved by repeating them getting the same results.</p></blockquote><p></p>
[QUOTE="Bart B, post: 1143923, member: 5302"] I think Sierra's Mark Walker believes all 3-shot groups for a given load will be the same size. Maybe he should tell that to the people testing their bullets during production runs and ask them to quit shooting several 10-shot groups. They don't work up a new load for different component lots nor a new test barrel. His velocity numbers are not uniformly proportional to charge weight increments and that's not seen in vertical shot location. All bullets fired don't have the same BC so those leaving at the same speed won't have identical trajectories as proved in his 3-shot groups. I'd bet his ladder test would yield different results if repeated. Good tests of anything are so proved by repeating them getting the same results. [/QUOTE]
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Newbie Load Development Question - How many rounds and how many grain increments?
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