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The Range
Ammo & Reloading
AR-15 Ammo thoughts
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<blockquote data-quote="diggler1833" data-source="post: 3777512" data-attributes="member: 48072"><p>1:9 twist is great for bullets in the 68 - 69 gr range, and will stabilize up to 75 grains on a case-by-case basis. My most accurate .223 runs the 68 gr Hornady and 69 gr SMK like they were made to go together and it has a 1:9 twist. Unfortunately I can't run the 75 gr AMAX or VLD fast enough to stabilize those well before I run into pressure signs in that particular barrel.</p><p></p><p>The 1:8 became popular due to the popularity of the 75 - 77 gr bullet weights.</p><p></p><p>Either twist rate does well with the 55 - 62 grain bullets too.</p></blockquote><p></p>
[QUOTE="diggler1833, post: 3777512, member: 48072"] 1:9 twist is great for bullets in the 68 - 69 gr range, and will stabilize up to 75 grains on a case-by-case basis. My most accurate .223 runs the 68 gr Hornady and 69 gr SMK like they were made to go together and it has a 1:9 twist. Unfortunately I can't run the 75 gr AMAX or VLD fast enough to stabilize those well before I run into pressure signs in that particular barrel. The 1:8 became popular due to the popularity of the 75 - 77 gr bullet weights. Either twist rate does well with the 55 - 62 grain bullets too. [/QUOTE]
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