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Rifles, Reloading, Optics, Equipment
Reloading
Chambered Round Alignment to Bore; Neck Sized vs Full Length Sized
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<blockquote data-quote="Bart B" data-source="post: 647618" data-attributes="member: 5302"><p>It may be for some, but I've not seen any difference in accuracy between Sierra's best heavy 30 caliber match bullets so sorted compared to using random selected ones. My 15 to 30 shot test groups at a thousand have produced average 5-shot extreme spreads equal to or better than current benchrest 6-group aggregates.</p><p></p><p>I think there's other variables, both in the cartridge and between muzzle and target that cause more inaccuracy than a couple tenths grain in weight and a couple thousandths in base to ogive datum. Take a look at a couple dozen pressure curves for rounds with zero spread in component variables to see one of those variables. Too bad exact charge weights, and even weight sorted primers don't produce identical pressure curves.</p></blockquote><p></p>
[QUOTE="Bart B, post: 647618, member: 5302"] It may be for some, but I've not seen any difference in accuracy between Sierra's best heavy 30 caliber match bullets so sorted compared to using random selected ones. My 15 to 30 shot test groups at a thousand have produced average 5-shot extreme spreads equal to or better than current benchrest 6-group aggregates. I think there's other variables, both in the cartridge and between muzzle and target that cause more inaccuracy than a couple tenths grain in weight and a couple thousandths in base to ogive datum. Take a look at a couple dozen pressure curves for rounds with zero spread in component variables to see one of those variables. Too bad exact charge weights, and even weight sorted primers don't produce identical pressure curves. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Chambered Round Alignment to Bore; Neck Sized vs Full Length Sized
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