While he never lays out the requirements for such a round in an organized fashion, a clear picture can be formed from select lines in his article: The General-Purpose Cartridge, as he calls it, would theoretically combine the lethality and range of a 7.62mm weapon with weapons and ammunition closer to 5.56mm systems in weight. I use 25.4 millimeters to the inch, 3.28 feet per meter, 145 PSI per MPA, and 15.43 grains per gram.Īnthony Williams - an internet military enthusiast, collector, and author - is the primary online proponent of the universal rifle/machine gun caliber. Often, alternate units will be contained within parenthesis following a figure, but it's always a good idea to keep conversion factors handy when working with small arms. Despite my efforts to keep to one system, this article hops between metric and imperial units quite a bit.
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