Rob Roberts 870/11-87

[wolverines]

I've had good success with RR and mag blend through my Benelli.  I'm wanting to pick up one of his chokes for my Remingtons.  I have an 870 with 24" pipe and 11-87 with 21".  I would like to try MagBlends, Nitro (blend), Fed HW7s and Hevi 13 7's or 6's.  Anyone had any experience with any of these set ups?
Restriction Suggestions?
Thanks