I just thought I'd throw my $.02 in on this thread.
Through procrastination and other flaws, I never had my Cougar out 'till today. Having read this thread, I thought i'd be in for a world of jams and general crap.
After a quick going over (it was stripped and cleaned weeks, nay, months ago

) I packed up and headed to the range. I had to test fire another shotgun so it came along as well.
After warming up with a JC Higgins bolt action

, I broke out the Cougar.
I have no mag extension on mine. She's as stock as the day I bought her. I was half was through a box of Winchester Universal and decided to finish them off. Five rounds loaded in, lets party.
First shot cycled the action, but it locked back. Failure to feed

. Not looking good. Tripped the bolt release and cycled the next round in. Gonna be a long day if this is how it works. .....Bang bang bang bang......

. No problems! Maybe it doesn't like the first round? Load 'er up and try again. This time, no problems with first shot. Do it again. Bang bang bang bang bang..........

. This thing works fine.
Something's gotta give out, too much hate for these. Again and again, bang bang bang bang bang. As fast as I could pull the trigger, she fired. Are my sights coming loose?.....nope. Forestock falling off.....nope.
Two boxes later and I switched to Winchester target loads and she ate those as well. Apparently, I got Jwan320's opposite.
Well, damn near 75 rounds through her rather quickly and aside from the first shot, the only problem was the choke tube was loose. Maybe people gotta hate these 'cause they're Chinese, but mine works like a charm.
The one thing I didn't do was try some 3" shells. (didn't bring any) Maybe those will start to rattle the sights off. That'll be for another trip.
(E)
