If 40 grain shoots OK in 1:12, would a 1:12 barrel be a good compromise if you happened to also shoot a lot of the 60 grain?.If 1:9 is too fast for 60 grain (but still works OK), how well will 36-40 grain work in a barrel with a twist rate that is faster than 1:16, but not too fast? As in how does it shoot in 1:12 vs 1:9?.Now with all that, I've still got some questions. There is a place producing a 1:11.25 barrel:.Current calculation by Fred in this thread said 1:11.25 was the calculated twist rate based on the formula.There are some older posts where I believe Fred mentioned 1:12 to be the correct twist for the 60 grain bullets.
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