Welcome to the forum,

While the 308 Win. is a superb cartridge for game and target its not suitable for woodchuck hunting. Dangerous ricochets are all too possible.

Someone may load sabots in the 308? What I mean is say a .224" 55 gr bullet in a plastic sleeve loaded in a 308 case.

Your 243 on the other hand with lighter bullets is an excellent chuck cartridge.

All guns should be locked up when not in use!