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Rifles, Reloading, Optics, Equipment
Reloading
How much does the amount of powder affect accuracy?
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<blockquote data-quote="Bart B" data-source="post: 181358" data-attributes="member: 5302"><p>First, I'd suggest testing ammo with nothing less than 15-shot groups. Anything less doesn't give good info on accuracy. Remember that if you average several few-shot groups, half of the groups will probably be larger than their average. And a composite of all fired groups will be larger than the biggest few-shot group.</p><p></p><p>Second, half-MOA groups through 600 yards can easily be had with a 0.75% grain spread in charge weight; that's 3/10ths of a grain for a 40-grain charge. But you've got to have several good things to do it; components, assembly techniques, rifle, sights and shooter. If any one of these things isn't up to snuff, accuracy won't be either.</p><p></p><p>Third, I'd use half-grain increments to test loads with. I don't think any smaller increments will show consistant differences. Especially if you shoot test groups of at least 15 shots. Note that if your test/measurement process doesn't produce the same results each time, it's not a good one.</p></blockquote><p></p>
[QUOTE="Bart B, post: 181358, member: 5302"] First, I'd suggest testing ammo with nothing less than 15-shot groups. Anything less doesn't give good info on accuracy. Remember that if you average several few-shot groups, half of the groups will probably be larger than their average. And a composite of all fired groups will be larger than the biggest few-shot group. Second, half-MOA groups through 600 yards can easily be had with a 0.75% grain spread in charge weight; that's 3/10ths of a grain for a 40-grain charge. But you've got to have several good things to do it; components, assembly techniques, rifle, sights and shooter. If any one of these things isn't up to snuff, accuracy won't be either. Third, I'd use half-grain increments to test loads with. I don't think any smaller increments will show consistant differences. Especially if you shoot test groups of at least 15 shots. Note that if your test/measurement process doesn't produce the same results each time, it's not a good one. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
How much does the amount of powder affect accuracy?
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