I use Universal Clays in all my 45 loads. Works great, very clean burning, no fouling, and I have no trouble making power factor. I load 230 gr FMC almost exclusively, but occasionally load 200 gr. Hornady swaged bullets. Some slight leading with the 200 gr bullets so I usually don't load these. I think in the future with the 200 gr lead bullets I will switch to just plain Clays and this might eliminate the leading almost completely.