I own an 8mag and its just not a gun im going to go out and shoot 200 rounds a day out of. For the most part i shoot it to work up loads and then it sits until i hunt with it. Shooting one like that your never going to wear a barrel out. Now something like a 223 or 22250 that is taken prarie dog hunting and gets a couple hundred rounds a day shot out of it might someday need to be rebarreled. But to be honest ive never worn a barrel out in any rifle. What i meant to say is your shoulder takes enough of a pounding shooting full power 8mag ammo that it keeps most of us from shooting one enough to actually wear it out.