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 US Navy & Palma Rifle Team Member
NRA High Power Master & Long Range High Master
NRA Smallbore Prone Master