One of my most accurate rifles is a red pad 1B that was originally chambered in 243 Win. I had the chamber recut to 243 AI, still using the factory barrel. The biggest obstacle in either rebarreling or rechambering was the quarter rib. It took a little extra effort on the smith’s part but everything turned out great. I’d shoot the rifle as is and cross that bridge when you get there. Chances are it will shoot just fine.
