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Nothing, really, but the name of the cartridge. When Winchester introduced the Model 94 in 1894 in the brand new smokeless powder round .30 Winchester caliber, most of the other ammunition on the market was black powder and had names such as 25-20, 44-40, 45-70, etc. These names stood for the caliber (diameter of the bullet) and how many grains of black powder were in the load. The .30 Winchester didn't follow that convention an dpeople didn't know what to expect, so it was not well accepted in the market and sold poorly. In a marketing move, Winchester changed the name to 30-30 (still, of course, a smokeless powder round with identical components as the .30 Winchester) and the guns and ammunition sold quite well.

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17y ago

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