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ar rifle barrel twist?

1092 Views 4 Replies 3 Participants Last post by  jbpmidas
What are the advantages/ disadvantages of the 1:7 1:8 and 1:9 rate of twist in 223 ar's. How about bullet weight to rate of twist?
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The faster twist, in general, stabilizes longer bullets better. Usually longer means heavier. I got my AR barrel in 1:7 to ensure it would shoot heavier bullets. Mine does very well with 69 grain Nosler CCHP's. It will shoot 10 well under 2" at 200 yards. 1:9 is generally in the middle and should shoot 69's and 55's pretty well.
I'd go along with that chart, as mine does not shoot 55's well at all. That is something to take into consideration when building a new one. If you don't reload and want to shoot the "cheap" stuff, you need to go with 1:9 or slower.
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