I have an M48 mauser with a rusty barrel. I've seen some info in sporterizing and I would probably go with something in the 308 family. I know starting with another type of action may be cheaper/easier. I would like to know what all should be done to the action itself other than drill and tap for scope mounts. Considering the parts available and the nature of the action, would it be better suited for a lighter/shorter walking around rifle, or heavy varmint type?