I'd have to agree there, for certain. I have a rifle that was made in 1871, cartridge gun mind you, that I've personally shot over 2,000 rounds (all reloads, all non corrosive of course) through - I can only GUESS how many tens of thousands of rounds went before mine. It's still got perfectly clean and sharp rifling.
I'm not sure that ordinary shooting without abusing the rifle CAN shoot the barrel out. Clean it properly with the right tools, keep it from rusting, and it'll last many more generations indeed.
The only rifles I've seen with "shot out" bores actually had "cleaning rod eroded" bores.
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