One of my rifles has wear to the rifling lands in .270 caliber. Do I want to just replace the barrel with a custom made contour using this as a pattern? It is a heavy contour but doesn't have a makers name although the guy that sold me the gun told me it is a Douglas barrel. Unfortunately, the barrel measurements do not match the dimensions for current Douglas barrels. The barrel was installed in the mid 1960's. Is it possible to have this barrel re-bored to a larger caliber such as .280 REM or even .30-'06 without removing it from the action? I spent many hours on the stock which costed me like $500 for the semi-inletted wood. So, I'd rather not have to mess with a channel re-do on the stock. My knowledge is nearly zero on this subject. Any help is appreciated.