just put a sure shot stock and 21 inch turkey barrel on my 870.
did some shooting Friday afternoon and this is what I came up with.
40 yards with the hevi mag blends 3 inch
665 jelly head 148
665 indian creek 147
then I tried the hevi number 7s 3 inch 2oz
665 jelly head 216
665 IC 187
I really thought the IC would do better but this barrel seems to like the jelly head. They were both nice even patterns.
also my 20 gauge encore seemed to be jealous of the 12 and put up 196 with number 7 nitros and a .555 IC