The only issues I have seen with the SBE or the SBE IIs is with the super light low recoil loads. I have seen two that would not consistantly work with light 1oz loads, but if you step it up to a heavy dove/handicap AA load, you should have no issues. I have seen gas operated 3.5" jam up with target loads much more frequently than the Inertia guns, but just about any 3.5" will occasionally have an issue or two with the really really light stuff. If you want a gun that will never jam, I would recommend an Over/Under... The gas guns accumulate fouling much in excess of the Inertia guns. After a box or two, this can really slow down the action due to friction caused by the fouling. When you have a super light load, those gas guns start to hang up. I have seen it in the 1187 Supermags, even with 3" loads, they seem to have the most problems. The Extremas are good, and the Golds are a close second, but will hang up after a box or two of the light stuff. Just part of the ball game. Unless you direly want/need a 3.5" for turkeys (which is the only thing I use a 3.5" for) then I would consider the M2 or Montefeltro instead of the SBE II. Will save you some money, and the 3" models will digest anything.