1) I didn't call you an idiot, but I stand by my statement about the intelligence of someone who can't clear a double-shuck jam in a BPS.
2) You stated, "I would take an 870 10 to 1 over the browning. If you ever have a jam in the bottom eject gun, it is a real bast.... to clear." Then you apparently applied your bad experiences with a 37 (a gun I have limited but bad experiences with) onto a BPS. Your statement should have read, "I would take an 870 10 to 1 over an ithica." Then it would have matched the reality of the experience you went on to explain, and also would have more closely matched reality. I also would have agreed with that statement.
3) I've never seen a significant 870 jam other than the failure to load kind.
4) Brass expansion (from cheap shells) can be a problem with any tight chamber. I've seen this problem most often in a 1200 but it could happen with any gun.