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Rifles, Reloading, Optics, Equipment
Reloading
Loaded ammo bullet runout???
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<blockquote data-quote="Bart B" data-source="post: 664763" data-attributes="member: 5302"><p>Commercial dies and SAAMI spec chambers (which is what commercial factory rifle barrels use) have been shooting well enough to win virtually all of the high power matches and set virtually all records as well as shooting test groups smaller than many current benchrest records since the early 1960's. And they don't prep their cases except for sorting by weight to 1% spread and turn necks to get less than 1/1000th spread in wall thickness.</p><p></p><p>Sierra Bullets uses commercial Redding full length sizing dies on their cases used to test their products for accuracy in SAAMI spec (or virtual copies thereof) chambers. I doubt anyone shoots their bullets more accurate than they do. Sierra doesn't do any case prep whatsoever. And they meter, not weigh, powder charges.</p><p></p><p>The only crap shoot's the way folks select and use the dies; not the way they themselves work. Especially with today's full length bushing dies. </p><p></p><p>And it's a myth that cases have to be a "perfect" fit to the chamber with minimum clearance all the way around the case to the chamber for best accuracy. Best proof of this is the M14 and M1 service rifles rebuilt to shoot 7.62 NATO mass produced ammo. With their extra moving parts having to go back into battery exactly the same for each shot, they won't be as accurate as a bolt gun. But they'll shoot a good lot of commercial match ammo under 2/3 MOA at 600 yards all day long; not too shabby at all for new cases, metered charges and bullet runout up to 3 or 4 thousandths. And mil spec chambers, too, which allow for a lot of room around a loaded round. That same ammo in a bolt gun will shoot 1/2 MOA at 600 or better and that's what the benchresters get these days as that's what their rifles shoot.</p></blockquote><p></p>
[QUOTE="Bart B, post: 664763, member: 5302"] Commercial dies and SAAMI spec chambers (which is what commercial factory rifle barrels use) have been shooting well enough to win virtually all of the high power matches and set virtually all records as well as shooting test groups smaller than many current benchrest records since the early 1960's. And they don't prep their cases except for sorting by weight to 1% spread and turn necks to get less than 1/1000th spread in wall thickness. Sierra Bullets uses commercial Redding full length sizing dies on their cases used to test their products for accuracy in SAAMI spec (or virtual copies thereof) chambers. I doubt anyone shoots their bullets more accurate than they do. Sierra doesn't do any case prep whatsoever. And they meter, not weigh, powder charges. The only crap shoot's the way folks select and use the dies; not the way they themselves work. Especially with today's full length bushing dies. And it's a myth that cases have to be a "perfect" fit to the chamber with minimum clearance all the way around the case to the chamber for best accuracy. Best proof of this is the M14 and M1 service rifles rebuilt to shoot 7.62 NATO mass produced ammo. With their extra moving parts having to go back into battery exactly the same for each shot, they won't be as accurate as a bolt gun. But they'll shoot a good lot of commercial match ammo under 2/3 MOA at 600 yards all day long; not too shabby at all for new cases, metered charges and bullet runout up to 3 or 4 thousandths. And mil spec chambers, too, which allow for a lot of room around a loaded round. That same ammo in a bolt gun will shoot 1/2 MOA at 600 or better and that's what the benchresters get these days as that's what their rifles shoot. [/QUOTE]
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Loaded ammo bullet runout???
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