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Posted: 1/9/2003 6:50:22 PM EST
Can someone tell me te rule of thumb (if there is one) for which bullet weights work with which rate of twist. Specifically:

1 in 8"
1 in 10"
1 in 12"

Heavier works better with 1 in XX, lighter works better with 1 in XX....that sort of thing.

Link Posted: 1/9/2003 9:07:40 PM EST
Link Posted: 1/10/2003 7:37:16 AM EST
Faster twists are needed with longer (not necessarily heavier) bullets. Light bullets will work well in a fast twist as long as you're satisfied with 1/2 MOA accuracy. For benchrest accuracy, there are advantages to light bullets with slow twists, but the effects are only significant when you're approaching 1/10 MOA. Generally the Sierra 69 and 77 and the Hornady 75 BTHP will work well with 1:9, and the 80 with 1:8, while the Hornady 75 A-Max needs 1:7.7 and the JLK 90 needs 1:6.5.
Link Posted: 1/10/2003 8:19:37 AM EST
My experience with 75gr Black Hills in a 1/9" was that it shot much worse than the 69gr. No keyholes, but 3" vs. 1" for 69gr & 52gr.
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