Chesty, I threw some info into QL about the 180's at 3200. Figuring a 30" tube and .142" shank in neck(recommended 1/2 diameter of bullet minimum) it stated 69.1 grains of RL25 at 111 1/2% filling/L.R. and 78438 PSI! Not so sure I'd try pushing that hard. Mind you QL is not absolute but this doesn't appear to be safely obtainable.

Great shooting by the way! Those groups are very impressive! I run the A-Max in mine at a very sloooow, as you put it, 2915 fps. I don't mind clicking up a couple extra for case life and accuracy. JMHO