Just shot some of my new 45 LC loads out of my Uberti 1866, and am getting some serious sooting on the casing and in the action. My load is 5.5 gr Trail Boss, 200 gr Lead RNFP crimped using a lee factory crimper, Win brass, and cci Large magnum primer. I loaded up a few 240gr plated bullets, and the sooting seemed less. Perhaps I should try some 300 grainers and see if that helps increase pressures enough to create a better seal, Or, go back to using Unique. Anybody had a similar issue, and how did you resolve it? This was my first experience using Trail boss.