Chamber Pressures

[Dean Romig]

I find it strange that ammo manufacturers don't print the p.s.i. rating on the box along with the dr. eq., the shot size, ounces of shot, and length of the shell.

Bruce, can you tell us what makes Remington, Federal, and Winchester more acceptable than all of the dozen or more other manufacturers of quality shotgun ammunition?

For those who have difficulty with learning the correct lead to allow in any given shooting situation, I suggest they stick with the exact same load every time they shoot until they have it figured out and are consistently powdering targets. (Notice I didn't suggest practicing on live birds - crippling birds shouldn't be an acceptable part of anyone's learning process.)






.

[Drew Hause]

The 'ol boys used some boomer loads

DuPont Trophy Oct 24 & 25 1895
http://www.la84foundation.org/Sports.../SL2606012.pdf
Capt. John L. Brewer was using a Greener gun of high grade. His shells were the U.M.C. Trap, 3 1/4 inches long, 4 Drams of DuPont (Bulk) powder by measure; one trap wad, two pink felts, 1/4 inch 11-gauge wad and one ordinary 12-gauge pink edge wad over the powder and 1 1/4 ounces of No. 7 chilled shot; the shell had a very hard square crimp.

From “Smokeless Shotgun Powders: Their Development, Composition and Ballistic Characteristics” by Wallace H Coxe; E.I. du Pont de Nemours & Co., 1927 pressures for 1 1/4 oz. 3 3/4 Dr. Eq.
Ballistite maximum pressure at 1” was 4.9 Long Tons = 15,344 psi by Burrard's conversion
Schultze at 1 3/4” was 4.5 Long Tons = 14,000 psi
DuPont Bulk at 1 2/3” was 4.1 Long Tons = 12,656 psi
All well above SAAMI recommended max. pressure

More information
https://docs.google.com/document/d/1...UOZEFU/preview