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Old November 9, 2010, 12:38 AM   #1
Ideal Tool
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Black Powder Pressure

Hello, I see where quite a few guys are curious about loading black powder in modern firearms not originally designed for black. The British .303 was first loaded with a compressed charge of black powder, this was : Cartridge,
S.A. Ball, Magazine Rifle, Mark 1. It used a 71.5 gr. load of compressed black powder and a 215gr. cupro-nickle jacketed bullet with a muzzle velocity of 1,850 fps. The pressure was 19 Tons....1 1/2 MORE tons than the first Cordite loaded rounds!
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Old November 9, 2010, 09:19 AM   #2
Mike Irwin
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Yep, some of the early smokeless powders didn't develop pressures as high as black powder.
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Old November 9, 2010, 09:59 AM   #3
Rifleman1776
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The history of cartridge ammunition began with them being loaded with black powder. There were many cartridges so loaded. BP produces much lower pressures than modern smokeless powders.
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Old November 9, 2010, 10:48 AM   #4
Unclenick
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Well, it depends on the grain size and case configuration as to how close it comes to being a bomb. I sure wouldn't stuff a 220 swift case with it, with that small mouth hole and wide case diameter.

By the way, was that imperial tons (long ton; 2240 lb) or metric tons (1000 kg; about 2205 lb) or the short ton (2000 lb)?
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