I just picked up a Super 90 with a 24" barrel. Does it take the same choke as a M3500? I already have a Sumtoy for the M3500 - not sure what constriction it is though. What constriction and shell works best for the 3" Super 90?
They are threaded for the same chokes. And I'd recommend a .650-.655 constriction with Hevi 6's and Hevi 7's or MagBlends.