What the the chances this is DCM

[browningautorifle]

heard of guys using large crescent wrenches

That was my thought too. I've seen the barrel flats grabbed in protected vise jaws and the crescent wrench(15") applied to the receiver top and bottom. Looked just like that.

[eb in oregon]

Hi Eb,
Any thoughts from that particular wear pattern ?

@ Dave HH,
I didn't give the bottom of a vice a thought. Was just thinking about the 2 sides.
__________________________________________________ __________________
I just thought it appeared to be unusual wear in a area you don't commonly see it.

Safe Sunday All,

I learned a long time ago that assumptions and speculations are generally incorrect. So I have no idea how that wear of the finish occurred, but in my experience as a retired machinist, mechanic, and gunsmith, it would generally take multiple use of a wrench to cause such wear in my opinion. Which is mine and mine alone.