Parker Gun Collectors Association Forums  

Go Back   Parker Gun Collectors Association Forums Parker Forums General Parker Discussions

Notices

 
 
Thread Tools Display Modes
Prev Previous Post   Next Post Next
Barrel wall thickness at chokes
Unread 01-20-2012, 12:00 PM   #1
Member
John Havard
PGCA Member
 
John Havard's Avatar

Member Info
 
Join Date: May 2011
Posts: 382
Thanks: 754
Thanked 367 Times in 87 Posts

Default Barrel wall thickness at chokes

Hello all,

Last night I received a DH 12-gauge with damascus barrels. I purchased it based on three photos from a dealer with hopes that it would be a worthwhile restoration candidate to become a usable shooter. Fairly banged up but a nice ball grip, good wood under the grunge of over 100 years of abuse, and reasonably good engraving.

This morning I pulled out my bore gauge and my Hosford wall thickness gauge and found the following:

Bores were consistently .733" with both left and right chokes at .710", well within what I would have expected although the chambers have been deepened to 2 3/4" (strike one).

Wall thickness through the majority of the barrels was very consistently .034-.040 or more so that, in spite of the scattered pits, seemed okay. However, when checking the wall thickness across the area of the chokes I found that wall thickness only increased perhaps by .010" instead of the .023" suggested by the choke amount (bore of .733" down to choke of .710").

What this makes me guess is that the external barrel walls, especially near the chokes, have been struck a bit, although it absolutely does not show under a magnifying glass when studied closely.

Here's my question for those with insight: can a choke wall thickness of only .040" withstand the forces exerted by the process of constricting a shot column as it is forcibly expelled through the constriction? Or should I send the shotgun back and get my money back?

Thanks in advance for all insights and input.

John
John Havard is offline   Reply With Quote
Visit John Havard's homepage!
 

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 05:47 AM.

Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.
Copyright © 1998 - 2025, Parkerguns.org
Copyright © 2004 Design par Megatekno
- 2008 style update 3.7 avec l'autorisation de son auteur par Stradfred.