Winchester SX2???

1 oz loads: will cycle in beretta 390, rem 1100,sx1, and new beretta from what I've seen where I shoot. Couple of the big boys have drilled 'port' to better cycle, but hinders heavier loads-they recommend factory or briley reliabilty pkg if one barrel for all, otherwise 2 barrel set up for competition , hunting and tactical. This also works for 7/8 12 ga loads.