I have a 223 barrel that I'm going to ream out to a 22-250. My question is this: Will the 22-250 reamer follow the 223 chamber or do I need to counterbore first. I am assuming the pilot bushing on the reamer will not reach the rifled bore? I have the lathe and necessary tooling but have only done short chambered barrels previously. Thanks for any insight you can give me.