FP 10 is the way to go
I shoot an SBEII and love it.
Super X 3 gets my vote... Goes bang everytime and shoulders quite nicely...
I have SBE II and love it. I have shot over 50 boxes of 2 3/4 reloads, 2 or 3 cases of factory 2/34 shells hunting doves and pigeons. Also close to case of black cloud 3 1/2 gooose and duck hunting. I have hunted in 90 degree summer days to 9 degree days in Febraury for geese, I can count the miss fires or jammes on one hand. Did I mention that I broke 2 mossberg 835 pump guns.
Love my SBE II.
Will not thicken or freeze just like FP10, but it also will not bake onto parts from the heat, clean by wiping it off.
Use an Extrema 2, previously used on a 391, and dio shoot the gas system "wet", again will not freeze and will not cake on. Awesome stuff.
I bought the new A5 this spring and so far have only shot it on the sporting clays range. It is a very nice gun and fits me well. I have shot a Berreta and SX3 at ducks for many years but get tired of cleaning the gas operated autos. The inertia action on the new A5 is supposed to be very reliable - Benelli uses that action and they are noted for being very reliable guns. Time will tell on the A5.
dlsweep. I agree a auto can turn into a single shot if not maintained. I would like to add it is the same for ANY firearm. IE last fall on a snow goose hunt both my berretta and my buddies 870 became single shots. after a oil job with break free both were back in action no more issues.
Very specific question: what five guns (semi-autos) would you rate have the lightest recoil, say with 3" #4 in Black Cloud or something similar ? I have been shooting a Benelli M2 for years and love it. Unfortunately, I had to have a pacemaker put in on my shooting side. If I mount the gun properly, there's room, but we all have those times where the mount is less than perfect. For those times I really need the lightest recoil. Thanks for some input.