Quote:
Originally Posted by ds762
the same reamer I got from PTG that said 300-221 now says 300 AAC Blackout (with the original 300/221 markings defaced).
Its the same reamer so which one do you want your gunsmith to call it??
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The chambers are not the same, it is like comparing 5.56mm to 223. They probably re-ground it. Nothing wrong with that.