That combo there is one of the best combinations ever for the 20 gauge gun if a person wants to keep from trying every combination out there. I have used Sum Toy 562-5 in REM, Moss 500, BPS, and Baikal 20 gauges and it just works when shooting the 3" Fed HW #7s.
This is not saying that others aren't as good so I am not downing any other choke brands.