You might contact Dan Pedersen at Classic Barrel and Gun Works (www.cutrifle.com) and ask him if he can do the work. I got his name from the guy in Washington I think Mr. Kofoed is referring to (I apologize that I've forgotten his name) when I was looking to rebore a Browning Lo-Wall from .22 Hornet to .32 H&R. He did a great job and I've enjoyed using the rifle since it was done. I don't know if he can do the regulation, but he was a square shooter and would tell you if he can't.