Shooting Sportsman Article

[Dean Romig]

I honestly don't believe we need to have these composite-barreled Parkers 'proofed' per se.

Common sense wins out in most cases and when it fails.... it just proves Darwin's Theory of Evolution. I think is was something like "The stupid shall perish." or somethin' like that....





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[Kensal Rise]

Originally Posted by Dean Romig

... it just proves Darwin's Theory of Evolution. I think is was something like "The stupid shall perish." or somethin' like that....

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Then how do you explain Washington DC?

[Dean Romig]

Originally Posted by John Campbell

Then how do you explain Washington DC?

I don't even try....





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[Drew Hause]

Ed: a pressure-distance curve for some new-fangled smokeless powders; 1 1/8 oz @ 1200 fps. Please note that Unique is the old Infallible Dense Smokeless slightly modified. The curves meet at about 2 1/2"



Pressure-time curve. The Green Dot and Unique curves are the same.



From “Smokeless Shotgun Powders: Their Development, Composition and Ballistic Characteristics” by Wallace H Coxe; E.I. du Pont de Nemours & Co., 1927, promoting DuPont Oval, p.20.
Charge was 3 Dr. Eq. and 1 1/4 oz.
Ballistite maximum pressure at 1” was 4.9 Long Tons = 10,976 psi
Schultze at 1 3/4” was 4.5 Long Tons = 10,080 psi
DuPont Bulk at 1 2/3” was 4.1 Long Tons = 9,184 psi
FFFg at 1 1/2” was 3.8 Long Tons = 8,512 psi
DuPont Oval at 2” was 3.5 Long Tons = 7,840 psi
+ 10-14% to reproduced modern transducer numbers so Ballistite was probably > 12,500 psi



Dense Ballistite was slightly slower than Red Dot and e3; the old Bulk Smokeless more so with a lower peak pressure; "progressive burning" Oval much more so.