308 Win wear and tear after 5k rounds

Petrov

Sergeant
Full Member
Minuteman
Oct 3, 2009
521
298
41
Western NY
So 308 discussion got me thinking. I was curious so I decided to take a look at my barrel which is almost at 5K rounds. Been running old sierra 155 palma bullets at 2935fps out of M24 profile barrel.
Pretty good carbon ring, the black steaks are further up the barrel.
 

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My SD and ES have gotten a tiny bit worse but i am 99.9% sure it is because my brass had 15+ reloadings and the inside of the necks is scored to heck. Im adding a mandrel as my last reloading step to address that.