Give her a GOOD cleaning ....then several applications of MPro 7 until all the copper is removed. After that I would give it a light lapping wit JB Bore bright. FWIW ...I usually hand lap my barrels (used or new ones) with JB before shooting them....makes cleaning a lot easier. Then take it out to the range and shoot it...see what happens.
If you are shooting a 308 you should be getting way more rounds out of that barrel BUT if you decide to replace it then NSS is a good place to check out your options.
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