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.22 Barrel twist rate and .22 avenger can handle un modified

As far as I know the avenger barrel is the same as the one on my liberty and Aspen. It's 18-1 and it loves AVS slugs which were designed for it. It needs the.217 size that Steve sells with the cup base.

Are they really stiff for you when you press them in I have some .216 Nielsen's and they are really stiff going in the bore