I have been attempting to get an accurate load for 45 colt for some time. I have a fine Taylor Cattleman 1873, an EAA revolver and a T/C contender carbine with a scope and silencer. Finally found two loads that work very well. The problem was the large air space in a 45 Colt case and most powders only used up 1/4 of the space. This leads to inconsistent ignition and poor accuracy. With the pistols you could get away with that sloppy accuracy but the carbine was useless. I finally discovered that by seating a card wad on top of the powder (Win 231) which keeps the powder up against the flash hole solved that problem. Now pressure and accuracy are very good. I have also found some Tin Star powder from LG Outdoors and tried that a try. The Tin Star powder filled the case very good nearly full to the base of the bullet when using a 250 gr lead bullet. Accuracy was also excellent with 100 fps faster the the win 231 I was using and had lower pressure. I was able to get 930 FPS from the 5 1/2" Taylor barrel using 9.6 gr of Tin Star. Cases extracted easy and the S&B primers I used looked good with less flattening then the win 231. I have tried many bullet types , jacket and cast and several different weight. I finally came to the conclusion that the best proper load for the 45 Colt in standard guns should be a 250 gr hard cast bullet ( I prefer Missouri Bullets because of their low cost and consistency) and 9.6 gr of Tin Star powder.