The 1200s were withdrawn pretty much before the Powers That Be decreed I was to be an instructor, but I had to clear a few. Memory dims,and we're talking about the late 70s, but...
Light firing pin strikes
Failure to feed(as distinguished from Failures To Fire). Oft this was in connection with a shell where it shouldn't be behind the carrier.
Action bar bending, possibly from a uniformed gorilla with more strength than sense.
And one trigger group that self destructed, but was serious enough to get me down off the West Wing and into the armory to clear a loaded weapon they couldn't empty and make safe.
NOTE: a recreational shotgun has different parameters, like the old Remington Model 11 I had(family gun) that would fail to feed about 1 out of 10 shells. What was merely irritating on the dove fields was crucial in AS scenarios,so that Browning design never saw active duty here.
IMO, the few new Winchesters I've shot,usually students guns,worked well in the limited shooting I did and sure beat repelling possible boarders with a kitchen knife.
Advice, if you like it shoot it a lot, sporting clays,doves, anything that will put a fair amount of shells through it in short order. If it glitches, sell it to someone you don't like and get an 870.
Hope this helps...