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Long Range Hunting & Shooting
308win. ???
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<blockquote data-quote="Michael Eichele" data-source="post: 320560" data-attributes="member: 1007"><p>150-155 = 14x</p><p></p><p>165-168 = 13x</p><p></p><p>175-180 = 12x</p><p></p><p>190-210 = 11x</p><p></p><p>After experimenting with many 308's and many barrels in various twists and barrel lengths I have settled on 26" for length and 11 or 11.25 for a twist. However I also prefer 168-200 grain pills in the 308 so I use the 11 or 11.25x. If I were going to stop at 180 grain bullets I would choose the 12x. It seems as if you can run top loads more accurately with the 26" than with the shorter barrels whereas shorter barrels prefer loads well under max potential even though physically there is only about 20 FPS gain or loss per inch of barrel max load for max load.</p></blockquote><p></p>
[QUOTE="Michael Eichele, post: 320560, member: 1007"] 150-155 = 14x 165-168 = 13x 175-180 = 12x 190-210 = 11x After experimenting with many 308's and many barrels in various twists and barrel lengths I have settled on 26" for length and 11 or 11.25 for a twist. However I also prefer 168-200 grain pills in the 308 so I use the 11 or 11.25x. If I were going to stop at 180 grain bullets I would choose the 12x. It seems as if you can run top loads more accurately with the 26" than with the shorter barrels whereas shorter barrels prefer loads well under max potential even though physically there is only about 20 FPS gain or loss per inch of barrel max load for max load. [/QUOTE]
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