In a model 7 I had a while back I settled on IMR 4831 with 180 accubonds. It was plenty quick enough and had great accuracy to boot. I tried the H4350 but I couldn't get the accuracy I was looking for. But that being said the magazine length had me jumping a long ways though. I did try superformance in it as well, yes it as a barn burner, but here again I didn't care for the accuracy.