Dirtiest powder I have ever used in a handgun load. After reading some review I bought an 8-lb to use in .45 ACP target loads with 200 grain cast bullets. Loads were accurate, but no more so than my usual 700-x loads, and the fouling was more pronounced.
Tried it in .45 Colt and .45 S&W with cast bullets at target velocities. More accurate than most other loads, but more soot all over the cylinder as well. Made shooting more than a few rounds unpleasant.
The last straw was .38 Special. Lousy accuracy, and horrible fouling at all levels with cast bullets from the top loads down to the lowest recommended. Firing 50 rounds resulted in the amount of fouling that most other powders produce after 500 rounds. Just a single box of 50 and my hands were blackened with a sooty residue that was difficult to wash off.
I won't be buying anymore, ever.