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Cas City Forum Hall & CAS-L  |  Special Interests - Groups & Societies  |  Shotguns  |  Topic: Lengthen chamber Win 97? 0 Members and 1 Guest are viewing this topic. « previous next »
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McCrower
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« on: January 19, 2017, 06:34:33 am »


I have an old 12ga. Win 1897 shotgun from 1909, which I use only for CAS and only light lead 70mm (2 3/4") ammo. Do I have to lengthen the chamber to prevent high chamber pressure or damage in the long run?


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Sir Charles deMouton-Black
THE ANCIENT SUBSTANCE ENDURES - ALL LESSER PROPELLANTS SHALL FIZZLE
NCOWS
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« Reply #1 on: January 19, 2017, 02:36:12 pm »

I'd love to know that as well. Mine is a 1908.

For Wild Bunch i use 2 3/8" cases roll crimped and get the extra round in the tube without any gunsmithing or follower changes.
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NCOWS #1154, SCORRS, STORM, BROW, 1860 Henry, Dirty Rat 502, CHINOOK COUNTRY
THE SUBLYME & HOLY ORDER OF THE SOOT (SHOTS)
Those who are no longer ignorant of History may relive it,
without the Blood, Sweat, and Tears.
With apologies to George Santayana & W. S. Churchill

"As Mark Twain once put it, “History doesn’t repeat itself, but it does rhyme.”
Coffinmaker
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« Reply #2 on: January 19, 2017, 03:43:50 pm »

YES.  To both you guys.  The early 97s were built with 2 1/2 inch chambers.  The chambers need to be recut to modern 2 3/4 and the forcing cone lengthened.  This can be done in one pass with a modern cutter.

And for those with early guns marked 2 3/4, those guns were chambered for ROLL CRIMP and will also generate excess chamber pressure.  the other benefit to recutting the chamber and a longer forcing cone is much less felt recoil.  Get it done.

Coffinmaker
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Gabriel Law
American Plainsmen Society
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« Reply #3 on: January 19, 2017, 07:07:17 pm »

I did...love my old gun!
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Sir Charles deMouton-Black
THE ANCIENT SUBSTANCE ENDURES - ALL LESSER PROPELLANTS SHALL FIZZLE
NCOWS
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« Reply #4 on: January 19, 2017, 08:28:32 pm »

I also have an 1953, which I assume has the longer chamber. I used it in a Cowboy match only once but took an overall win. Of course, I was practising twice a week then and buying & shooting .22 LR by to case.
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NCOWS #1154, SCORRS, STORM, BROW, 1860 Henry, Dirty Rat 502, CHINOOK COUNTRY
THE SUBLYME & HOLY ORDER OF THE SOOT (SHOTS)
Those who are no longer ignorant of History may relive it,
without the Blood, Sweat, and Tears.
With apologies to George Santayana & W. S. Churchill

"As Mark Twain once put it, “History doesn’t repeat itself, but it does rhyme.”
Coffinmaker
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« Reply #5 on: January 19, 2017, 09:07:18 pm »

Sir Charles,

Yep.  Late 40s, early 50s production.  I don't actually remember when the '97 went to the "modern" 2 3/4 chamber that allows the star crimp to unfold.  When the shop was open, when the '97s came in, I always measured the chamber.  I had a special "blank" I used.  If it wouldn't go, the chamber needed recut.

Coffinmaker
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Cas City Forum Hall & CAS-L  |  Special Interests - Groups & Societies  |  Shotguns  |  Topic: Lengthen chamber Win 97? « previous next »
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