I shot the IC .665 while back with the 3 1/2" #5s in the SX2. The numbers may have been a tad better, but with the Trulock, the gun shoots pretty well dead on with the bead. With the IC the gun tends to shoot low. I really prefer to use my bead if I can get by with it. Would any of you fellows be afraid to use the #4s averaging 130/10"?