Hello. I am hoping with the wealth of knowledge on this site someone already has the answer to my question. My plan is to take a Ruger American 6.5 CM and have the chamber recut to .260 Ackley Improved. If I'm thinking correctly since the barrel on the Ruger is attached and headspaced with a barrel nut this should be a relatively easy job for a good gunsmith. I know some people will ask "why?" but much of the pleasure I get from this hobby is experimenting with the possibilities. Thanks for any help.