Well, I've got a Mossberg 590 for a few years now, and I've shot thousands of rounds through it. Everything from #9 birdshot to 00 buckshot to rusty nails and broken glass shards... hehehe (bought a reloading press and went crazy)
Havent noticed any damage to the barrel, not even excessive scratches from all the wild loads I've shot through it.
-=Hairball=-
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