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Forums10
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Most Online1,344 Apr 29th, 2024
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Joined: Dec 2001
Posts: 3,964 Likes: 89
Sidelock
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Sidelock
Joined: Dec 2001
Posts: 3,964 Likes: 89 |
I believe he was using plastic hulls and wads with the nitro loads and paper/fiber with the black powder.
When an old man dies a library burns to the ground. (Old African proverb)
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Joined: Jan 2002
Posts: 3,642 Likes: 1
Sidelock
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Sidelock
Joined: Jan 2002
Posts: 3,642 Likes: 1 |
HD,
He used Federal and Estate (thinner) plastic hulls with a fiber base-wad, fast burning Clays powder, and a one-piece plastic wad.
JC
"...it is always advisable to perceive clearly our ignorance."ť Charles Darwin
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Joined: Aug 2006
Posts: 931
Sidelock
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Sidelock
Joined: Aug 2006
Posts: 931 |
Thank you. I though so. Could be interesting if the tests were reproduced with nitro powder and paper hulls. I mean, the warnings of not using long hulls in short chambers couldn't appear out of the blue, and paper shells, being thicker, could have a more marked effect in pressure raising.
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Joined: Jan 2002
Posts: 3,642 Likes: 1
Sidelock
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Sidelock
Joined: Jan 2002
Posts: 3,642 Likes: 1 |
After reading Mr. Bell's results I started using 67mm plastic shells loaded to CIP standards in my Manufrance Idéal with 65mm chambers, proofed to 1,100Kg. I only recently lengthened its forcing cones and have not yet tried it, but I expect a slightly lower felt recoil, (though I am not sure I'll perceive it).
JC
"...it is always advisable to perceive clearly our ignorance."ť Charles Darwin
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Joined: Jan 2002
Posts: 3,642 Likes: 1
Sidelock
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Sidelock
Joined: Jan 2002
Posts: 3,642 Likes: 1 |
HD,
Sorry for the partial answer. Mr. Bell also tests paper hulls (Federal) loaded with one ounce of lead shot, Clays powder, and a one piece plastic wad.
His results show a lower increase in pressure than the plastic hulls. 602 psi increase at the breech and also at the cone. As he says, "not enough to worry about". The same test with the longer forcing cone reduces the pressure increase to less than 100psi at one inch and 100psi at the cone.
JC
Last edited by JayCee; 08/22/13 12:17 PM.
"...it is always advisable to perceive clearly our ignorance."ť Charles Darwin
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Joined: Jan 2002
Posts: 11,384 Likes: 106
Sidelock
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Sidelock
Joined: Jan 2002
Posts: 11,384 Likes: 106 |
He used a variety of hulls, both plastic and paper, and wads, both fiber and plastic. Win AA and Rem hulls as well as Federal. See DGJ, Winter 2001.
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Joined: Apr 2004
Posts: 738
Sidelock
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Sidelock
Joined: Apr 2004
Posts: 738 |
Does Sherman Bell have any books printed or just DGJ articles?
Jerry
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Joined: Dec 2001
Posts: 12,743
Sidelock
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Sidelock
Joined: Dec 2001
Posts: 12,743 |
The original tests on this subject were run many years ago with the introduction of the pie crimp hull. The result was as Rocketman has already stated that virtually all factory loaded pie/fold crimp shells were/are longer than the short chambered guns, "Including Those Certified for use in Those Guns". These tests were all run with paper hulls & card & felt wadding. Bell just re-invented the wheel, it had all been established beginning in the late 1930's & completed immediately following WWII, by the end of the 1940's. As to the length of the shell in relation to the chamber proper use of a shell longer than the chamber dictates a shell having a pie crimp & a "Loaded Length" very close to a roll crimp hull of same length as chamber. It is decidedly un-wise to fire roll crimp shells in a chamber shorter than the shell, especially if the shell is long enough the end of the loaded shell will be forced into the cone Prior to Firing.
PS; If you want a book which thoroughly discusses this along with about anything else you want to know concerning a shotgun get "The Modern Shotgun" by Burrard
Last edited by 2-piper; 08/22/13 04:57 PM. Reason: added PS
Miller/TN I Didn't Say Everything I Said, Yogi Berra
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Joined: Jan 2002
Posts: 11,384 Likes: 106
Sidelock
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Sidelock
Joined: Jan 2002
Posts: 11,384 Likes: 106 |
I'd submit that Bell did more than just "reinvent the wheel". Like maybe proved that radial ply tires are a good idea. Indeed, early tests on longer shells in shorter chambers were done with paper hulls and fiber wads. Bell conducted tests with plastic hulls and wads--which meant that those who stated "but those weren't modern plastic shells" no longer had a leg to stand on.
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Joined: Jan 2003
Posts: 1,227
Sidelock
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Sidelock
Joined: Jan 2003
Posts: 1,227 |
Sherman Bell generated data.
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