I disagree about the sturdiness of 311's. I have owned 4 311's and 1 511. They only lock up on the top snap, there are no locking under lugs, a 12 gauge will only last about 3000 shells before it will be loose and start to vibrate. Top snaps are readily available. From numerich, which means to be its a common occurance, i have replaced at least 8 of them. The stocks also tend to crack out under use.
They may be fine in a subgauge, I never shot my subgauges enough to really test them out, but I am sure they will shoot loose too, may just take longer.
They also dont open fully unless you hold them open to load or replace the hammer springs with reduced power springs.
The only good thing is they are cheap. If you want a cheap SxS to say you have one, and not shoot it a whole lot, they will get you by.
I have sold off all of mine, and I have no regrets, which says a lot, I have trouble selling guns.
