[Magnum88C]

If you have to have an upgraded .45ACP, why not just use the .45 Super? Exact same size as the ACP, so you're not relying entirely on the extractor to hold the cartridge in place, which is just a recipe for, well,

Which is a recipe for poor ignition and spotty accuracy.

 

[Magnum88C]

E=MC^2 gives the energy output of a given mass of matter if converted entirely to energy in a 100% efficient reaction.

kinetic energy = (1/2)MV^2
momentum = MV