[9x45]

I used to run TG in my old G21s. Cast 230s on top of 4.5 grains at 1.250" Chrono'd about 740 fps to make Major. TG is not the first choice for .45acp though, it would be 5 grains of W231, because of the lower density takes up more volume. Slower powders work better in .45acps.