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Long Range Hunting & Shooting
Assistance in setting up a fast twist .224
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<blockquote data-quote="Mike in Texas" data-source="post: 13231" data-attributes="member: 1889"><p>I can help alittle with info on fast 22-250's.</p><p></p><p>Built several with 8 and 9 twist barrels.</p><p>What I've found is that with the 75 amax either one works but the 9 works better.</p><p>It also seems to work better with the 80 grain SMK or equal under most conditions.</p><p></p><p>I shoot at 1200 feet ASL, and found with the 9 twist the long range accuracy ( 1000-1200 yard) was better with the 80 grain in 9 twist as long as the velocity could be kept above 2900 fps. With H4350 or N160 this is easily achieved and although the N160 is really temp sensitive. </p><p></p><p>If you shoot in cold weather or sea level altitudes I would build an 8 twist.</p></blockquote><p></p>
[QUOTE="Mike in Texas, post: 13231, member: 1889"] I can help alittle with info on fast 22-250's. Built several with 8 and 9 twist barrels. What I've found is that with the 75 amax either one works but the 9 works better. It also seems to work better with the 80 grain SMK or equal under most conditions. I shoot at 1200 feet ASL, and found with the 9 twist the long range accuracy ( 1000-1200 yard) was better with the 80 grain in 9 twist as long as the velocity could be kept above 2900 fps. With H4350 or N160 this is easily achieved and although the N160 is really temp sensitive. If you shoot in cold weather or sea level altitudes I would build an 8 twist. [/QUOTE]
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Assistance in setting up a fast twist .224
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