Well as you know I got my Lyman 55 gr mold awhile back now that I have GC's I've been working on a load for my AR's. Already had this load made up for some comercial Cast I bought. It function the action well and is fairly accurate to about 50 yards in my 16" DPMS carbine. But you can forget 100 yards! This load is pretty good in my Sav Hunter 11 at 100 yards about an inch group normally! Well I loaded some of the Lyman cast at 19gr IMR4895 like the others! I didn't take in to account for diffferent design- loaded them to long and first range trip was a bust -action wouldn't close! So got back and seated them shorter and actually function checked them this time! Since I have to seat them deeper I think I can get away with a lighter charge -only fired 8 rounds as it was cold out. Next load is going to be 18.5 grs hopefully with better group.