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Rifles, Reloading, Optics, Equipment
Reloading
Way in or way out ?
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<blockquote data-quote="Bart B" data-source="post: 98189" data-attributes="member: 5302"><p>BountyHunter, I like your "MOB" rifle description. It's much like the one heard back in the early 1970's when the USNRA changed their 1000-yard highpower target's high scoring ring down to 20 inches from 36 inches. It had been 36 inches since about 1900 when rifles needed to keep all their shots in it were occasionally called "wash-tub rifles." After the high scoring ring was reduced to 20 inches one might hear rifles needed to keep all the shots in it called "bushel-basket rifles." I doubt there's much difference in accuracy between a bushel-basket or MOG rifle.</p><p></p><p>Regarding how accurate the most skilled rifleman can be with their first shot at this 1000 yard target, here's what I've observed over the last four decades using both scope or aperture sights. Doesn't matter what cartridge or rifle is used, after estimating and making all the corrections for conditions the very best of them will put their first shot inide the 10-inch diameter X-ring no more than 10 to 15 percent of the time. About 30 to 40 percent of the time their first show will go inside the 20-inch 10-ring. The second shot is typically closer to center. Watching and shooting 1K-yard benchrest matches the first shot miss distance is about the same.</p><p></p><p>There are some instances where quite a bit of bullet jump didn't cause a problem. A top barrel maker was using 220-gr. Sierra HPMK's seated 1/4th inch off the lands in a 30 caliber magagnum and put over 20 consecutive shots of 'em into about 5 to 6 inches at 1000 yards shooting prone with a scope; that's about as good as 1K-yd. BR group aggregates get.</p><p></p><p>It's been my experience that ammo with case necks and seated bullets very, very straight, one can get excellent accuracy with quite a bit of bullet jump. </p><p></p><p>The bottom line for best accuracy seems to be: "Keep all the variables as close to zero as possible." Learning what those variables are and how to correct the big ones is something else.</p></blockquote><p></p>
[QUOTE="Bart B, post: 98189, member: 5302"] BountyHunter, I like your "MOB" rifle description. It's much like the one heard back in the early 1970's when the USNRA changed their 1000-yard highpower target's high scoring ring down to 20 inches from 36 inches. It had been 36 inches since about 1900 when rifles needed to keep all their shots in it were occasionally called "wash-tub rifles." After the high scoring ring was reduced to 20 inches one might hear rifles needed to keep all the shots in it called "bushel-basket rifles." I doubt there's much difference in accuracy between a bushel-basket or MOG rifle. Regarding how accurate the most skilled rifleman can be with their first shot at this 1000 yard target, here's what I've observed over the last four decades using both scope or aperture sights. Doesn't matter what cartridge or rifle is used, after estimating and making all the corrections for conditions the very best of them will put their first shot inide the 10-inch diameter X-ring no more than 10 to 15 percent of the time. About 30 to 40 percent of the time their first show will go inside the 20-inch 10-ring. The second shot is typically closer to center. Watching and shooting 1K-yard benchrest matches the first shot miss distance is about the same. There are some instances where quite a bit of bullet jump didn't cause a problem. A top barrel maker was using 220-gr. Sierra HPMK's seated 1/4th inch off the lands in a 30 caliber magagnum and put over 20 consecutive shots of 'em into about 5 to 6 inches at 1000 yards shooting prone with a scope; that's about as good as 1K-yd. BR group aggregates get. It's been my experience that ammo with case necks and seated bullets very, very straight, one can get excellent accuracy with quite a bit of bullet jump. The bottom line for best accuracy seems to be: "Keep all the variables as close to zero as possible." Learning what those variables are and how to correct the big ones is something else. [/QUOTE]
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