The Firing Line Forums - View Single Post

kirbythegunsmith · May 5, 2011, 01:09 AM

I just completed a thorough rework of a 97 with multiple issues including rejuvenating a pair of squeezed/dented/bulged/bent barrels that needed to be refit to the frame.

The idea that a barrel should not be snug to the frame is quite off base- and could be considered as proof that somebody is unfamiliar with the mechanical aspects concerning the takedown Winchester shotgun.

Another point of contention would be the issue of polishing the chamber of a 97 with something that is in any way abrasive. Any material removal AT ALL in a takedown barrel that uses a frame mounted chamber ring is potentially creating or worsening a chamber problem.

What I previously posted here.
--------------------------------
If that is a take-down gun, there can be a chamber ring/barrel chamber overlap offset that catches the expanding brass that protrudes past the interface line and has diametral interference to extraction.
--------------------------------------------------------------------

The same extraction difficulties can be created by making the chamber larger than the chamber ring, since that can make an overlap offset in the complete circle- not just on one side.

When some unfortunate polishing was overdone (along with other amateur-gunsmith-created problems) to a Model-12 Magnum, it made such a mismatch that a rod was needed to drive out any fired shell.
That barrel needed to have the chamber sleeved to alleviate such a gross condition, and that repair is not cheap.

An extractor spring could be helpful with the original problem stated, and adjusting the barrel fit is always uppermost in the improvement list.

Throwing in a "chamber polish" might be beneficial to some barrels with extraction complaints, but is anathema to improving a 97 or M-12.

Kirby

May 5, 2011, 01:09 AM	#19
kirbythegunsmith Member Join Date: February 15, 2007 Posts: 75	Details I just completed a thorough rework of a 97 with multiple issues including rejuvenating a pair of squeezed/dented/bulged/bent barrels that needed to be refit to the frame. The idea that a barrel should not be snug to the frame is quite off base- and could be considered as proof that somebody is unfamiliar with the mechanical aspects concerning the takedown Winchester shotgun. Another point of contention would be the issue of polishing the chamber of a 97 with something that is in any way abrasive. Any material removal AT ALL in a takedown barrel that uses a frame mounted chamber ring is potentially creating or worsening a chamber problem. What I previously posted here. -------------------------------- If that is a take-down gun, there can be a chamber ring/barrel chamber overlap offset that catches the expanding brass that protrudes past the interface line and has diametral interference to extraction. -------------------------------------------------------------------- The same extraction difficulties can be created by making the chamber larger than the chamber ring, since that can make an overlap offset in the complete circle- not just on one side. When some unfortunate polishing was overdone (along with other amateur-gunsmith-created problems) to a Model-12 Magnum, it made such a mismatch that a rod was needed to drive out any fired shell. That barrel needed to have the chamber sleeved to alleviate such a gross condition, and that repair is not cheap. An extractor spring could be helpful with the original problem stated, and adjusting the barrel fit is always uppermost in the improvement list. Throwing in a "chamber polish" might be beneficial to some barrels with extraction complaints, but is anathema to improving a 97 or M-12. Kirby __________________ [email protected] New gunsmithing website: http://theshotgunshop.net/ Articles containing valuable information are on every page.