In its heyday in match rifles, the .308 has a barrel life of 2000 rounds of pristine accuracy; about 1000 more of very good accuracy. And .243's about 1000 rounds at pristine level, 500 more of very good accuracy.
US Navy Distinguished Marksman Badge 153
Former USA Palma Team Member
NRA High Power Long Range High Master
NRA Smallbore Prone Master