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<blockquote data-quote="Wanfalt1" data-source="post: 1370559" data-attributes="member: 101097"><p>I could shoot the 69 grain Sierra Matchkings out of the 14 twist, at 500 feet above sea level but that was out of a 22-250 Ackley. I shot them at an any rifle any sight match at 600 in Milan Il. My score was 185 for 20 shots. Not as good as I had hoped. I was slung into a Tupperware stock. Not sure what the issue was. It was making round holes on the target though. I totally agree that length increases the need for a faster twist but so does bearing surface. A 70 grain flat base with a long bearing surface would most likely work fine. I have used several ballistic programs and none of them were ever made to fit exactly. I have spent my entire life trying to figure out what works best. Having said that I don't quote anything I haven't tried. I have a 12 and 14 twist you are welcome to try. If you have a Remington 700. I will send you the barrels and loaded 53 amax.</p></blockquote><p></p>
[QUOTE="Wanfalt1, post: 1370559, member: 101097"] I could shoot the 69 grain Sierra Matchkings out of the 14 twist, at 500 feet above sea level but that was out of a 22-250 Ackley. I shot them at an any rifle any sight match at 600 in Milan Il. My score was 185 for 20 shots. Not as good as I had hoped. I was slung into a Tupperware stock. Not sure what the issue was. It was making round holes on the target though. I totally agree that length increases the need for a faster twist but so does bearing surface. A 70 grain flat base with a long bearing surface would most likely work fine. I have used several ballistic programs and none of them were ever made to fit exactly. I have spent my entire life trying to figure out what works best. Having said that I don't quote anything I haven't tried. I have a 12 and 14 twist you are welcome to try. If you have a Remington 700. I will send you the barrels and loaded 53 amax. [/QUOTE]
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