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Old February 4, 2013, 04:57 PM   #15
Senior Member
Join Date: January 15, 2011
Location: Deep South
Posts: 160
No, a 1:9 twist rate is best suited for lighter grain ammo. 55gr max really.
This is not correct. I have a 1:9 that I've shot up to 70gr with good result.

The bottom table shows max bullet weight per twist rate. Look at .224 column.
NYS expat happily living in the deep South
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