I have a 935 with and Indian Creek choke and I shoot 3.5 inch Win supreme 2 oz HV #6. At a lasered 40 yards I am getting 57 pellets in the head and neck and 134 in a paper pie plate.
another quote and this is with lead not HTL!
so as you know every gun is different and just because yours does not like to shoot the load you want to out of that particular choke does not mean they suck. it is also possible that for what ever reason you got a bad choke. things happen when companies manufacture things. it happens to every company.
but since you are set on not using IC. maybe try a jellyhead, puregold, sumtoy, rob Roberts, truglow ssx or a Hevi13 choke. or if you really want to get into it send your gun to Rob Roberts and tell him what kind of shell you want to shoot and he will make a choke that will do what you want it to do and shoot the gun to make sure it does.