I went out today with some lighter loads. found a couple of boxes of Winchester AA 2 3/4" - 2.75 dr - 1 oz - 8 shot.
I have not cleaned the gun again since I started. My buddy came along today to try it too.
result: shot half the box with no problems, about half way thru the box the gun on the 3rd shot did not lock open. It did not jam but the action did not stay back. shot the rest of the box with no more problems.
That is about 7 boxes of shells with no cleaning or break in. I must say I am more than happy. As for my buddy he had his SBE 1 and it jammed 9 times before it shot 25 of the AA shells.
Sorry had to say that after all the crap he gave me for getting the SX2
So far still a big thumbs up to the SX2 3.5"