Guy's just picked up a 535 and looking for choke suggestions with 3.5" Fed TSS 7's 2.25oz. I have the following on hand that fit this gun from my Win 1300(which is on loan to my oldest son):
Undertaker Non Ported HD .675
Undertaker Non Ported Lead Only .665
Carlson Long Beard Ported .660
Truglo SSX .643(put up 160-170's with Win 1300 and HW 3" 1 5/8oz 7's)
Winchester Extra Full Ported #2 .665(came with my 1300 years ago)
Mossberg XXFull Turkey Lead Only .670(came with gun)
I haven't played with new TSS, new Flex Flite Control or 3.5" shells so feel free to bring me up to speed in regards to porting, constriction for 3.5" loads etc..
Thanks!