For .45 Colt: Been used in OLD STYLE VAQUEROS & BLACHAWKS (not tried in "new Vaqueros" yet).200 gr or 225 gr bullets...1/8" less'n fulla FFFg....Win LP primers>>>> SMOKIN'!!!200 gr or 225 gr bullets...6.0 gr of Win 231....Win LP primers>>>> non-smokin'MG