My Gaucho shoots very high with the mid-range charges for 255gr LSWC. at 6.2 gr I was high by over a foot...
The max loads listed are 6.5 gr at about 11,000 CUP. Looks like there is more room in the case and standard pressures for 45 Colt usually state a max of around 14,000 CUP.
Is there something strange about this fluffy powder, or is IMR just being conservative considering the old SAA revolvers out there?
-tINY