doublegunshop.com - home Forums General Discussion DoubleGun BBS @ doublegunshop.com Measure those barrels if you can.

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Smokeless Powder data from Sporting Guns and Gunpowders: Comprising a Selection from Reports of Experiments, and Other Articles Published in the "Field" Newspaper, Relative to Firearms and Explosives, 1897



Using the estimated Lead Crusher Pressure (Cp) conversion to PSI (pound force per square inch)
(Cp x 1.5) - .5 = TSI, TSI X 2240 = PSI

32 Gr Ballistite (1 1/8 oz at 1232 fps muzzle velocity = 3 Dram Equiv.)
Breech - 2.9 Tons per Square Inch (UK, Long) = 8624 psi
(2.9 x 1.5 = 4.35, 4.35 - .5 = 3.85 TSI, 3.85 x 2240 = 8624psi)
2 1/2" - 2.2 Tons = 6272 psi
6� - 1.2 Tons = 3718 psi
12� - .81 Tons = 1602 psi
18� - .33 Tons = 1120 psi
24� - .21 Tons = 694 psi


Pressure data published by Neil Winston - www.claytargettesting.com.
The shot leaves the (30") barrel at about 3.5 milliseconds after ignition. The pressure is down to about 500 psi by 2 milliseconds.



Red Dot and PB