Colt, seems caliber designations are as logical...NOT...as overall cartridge designations. Where oh where did anyone get '.38' out of a bullet diameter of 0.357"?
There's no magic--you just have to find a reloading manual online and look at the bullet-diameter specification.
And there's not much logical about your examples of calibers, either, with bullet diameters of 0.224" and 0.430" (NOT 0.44"!!!). Only the .45-caliber's bullet diameter of 0.452" rounds to its designation of .45.