I read an article by Paco Kelly and he states that Bullseye has a pressure curve with a fast spike that is hard on the 1873's, even though one may load the cartridge with low peak pressure. This man knows more than I, but was wondering what you all think about this. My gun is a 1873 reproduction, in .45 Colt. I know Bullseye is not the best powder for the old cartridge, but I have a couple pounds I would like to use up. I normally use 8gr. of Unique with a 255gr. boolit. If I have to I will use it up in .38's, but I already have a couple thousand rounds of that loaded. I was hoping to use the Bullseye in light to med. loads in the .45. Any input appreciated!!