I tried it in as my light 45 Colt loads -- I believe it is designed for "cowboy" loads that then to be on the light side. I thought it worked OK but found it to be much more susceptible to static charge than other powdered (Titegroup, Clays, VV, etc.). I had issues with it clinging to the drop tube and falling outside of the case -- no a showstopper but irritating. I switched back to Titegroup and occassionally

Clays.