My friend and I both got a Savage 320 HD from a gun show 2 weeks ago.
So far I have put about 400 wal-mart fed bulk bird-shot through mine. 300 of them were done Saturday. About 150 through his so far. And haven't had any problems. Or real problems I should say, I'm new to shotguns, so I thought the bolt auto ejecting shells was an issue, but I guess not, cause its a "speed pump". And it hasn't caused any real issues.
300 rounds in about an hour and half seems like a pretty good torture test. It was a lot was fun.
My only regret now is that I got the 18" barrel, and not the combo (wasn't an option, bought the first sub 200$ shotty I saw)
Trap seems like something Id like to get into, so that my only hang up after purchase.
If I can't get a LGS to thread the barrel for choke, I'll likely replace it with a Mossberg 500 combo from Big 5.