I run a spreadsheet program developed by Charles Schwartz that calculates many different factors including, formerly, AIT, or Average Incapacitation Time. The formula was developed in conjunction with the reported results from the Strasborg Goat Tests, that remain controversial. But Charles has written a new formula where a prediction is made for Expected Incapacitation Time and based on Newton's laws. I should have the new program soon.
As far as the .45 ACP military load itself. As T.O.M. pointed out, commercial ammo-makers do get powders that are blended for a specific use. I would not, however, rule out the possibility that Winchester's Military load is charged with W231. Target velocity would be 850 FPS for a 230 gr. FMJ and that's not terribly difficult to accomplish from a 5" 1911. Winchester has developed the "next generation" powder that came out just a few years back in W244. There are several different powders that do essentially the same thing, so matching the velocity of the 230 gr. FMJ load is not really restricted to any one particular powder. AA No 2 and Ramshot ZIP are also suitable choices.
