Remington had some function problems with these guns for several years. Supposedly they have been solved by enlarging the gas ports, but I do not know this for sure.If you can find one that works well, they are much nicer on the shoulder than the Benelli / Beretta guns.
The A5 Browning can easily be cut down to shorter bbl. length and still work fine. It is, head and shoulders, a better gun than anything else on the market so long as you take it completely apart and clean it occasionaly and keep good springs in it. The A5's are so well designed that they will continue to work without letting you know you have a problem. I have seen them work with broken bolts, etc. and never bobble. Parts, however are damned expensive.
Even though you will remove the choke by cutting down a standard barrel, the newer "reduced" buckshot loads pattern extremely well in cylinder bore 870's...I see no reason why they will not work in an A5 provided they produce enough recoil to function reliably.