Yesterday I finished off the last of those 15 grains of IMR-4227 by loading them in the properly chambered .44-40 Colt’s SAA. They were just OK however I’m done with that load and this Colt’s .44-40 has a new .45 barrel on order and it will be recalibrated ASAP.
I did try 454190 454” over 20 grains of IMR-4227 in 4 3/4” and 7 1/2” Colt’s .45’s and found the load satisfactory at 25 and 50 yards, however I see no reason to switch from my standard .45 load of 8.0 to 8.5 grains of Unique at this time.