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You can't go by that,"up to 85 grains for 1:12".... That's what McGowen told me too. Bullet weight isn't the way to go to pick a twist rate.

that site is too broad..... the 55 will not stabilize with a 1:12

Hey all, this is my first post and I hope you all can help a guy out of this dilemma. I ran across this website with a twist rate calculator. http://kwk.us/twist.html The barrel company I bought my varmint barrel from steered me in the wrong direction for bullet selection and...