Bulged barrel


Firearm & Gun Forum - FireArmsTalk.com > Gunsmithing & Do-It-Yourself Projects > Gunsmithing Forum > Bulged barrel

Reply
 
LinkBack Thread Tools Display Modes
Old 11-03-2013, 01:27 AM   #1
Feedback Score: 0 reviews
 
Join Date: Mar 2011
Location: tucson,arizona
Posts: 477
Liked 180 Times on 116 Posts
Likes Given: 53

Default Bulged barrel

I recently got a Mexican Mauser rifle dated 1937. I noticed that when cleaning with a brush or a patch, the drag along the length of the barrel is not constant. About 4 inches back from the muzzle, the drag on the brush goes way down. Ahead of that point or behind it the drag feels normal. So I put the calipers on the barrel. The suspected bulge measures .695 inch diameter and the places in front or behind measure .687 inch diameter. Is there a way to correct this or just let it go. I cannot imagine that it is an improvement to the gun.



__________________
JWagner is offline  
 
Reply With Quote

Join FirearmsTalk.com Today - It's Free!

Are you a firearms enthusiast? Then we hope you will join the community. You will gain access to post, create threads, private message, upload images, join groups and more.

Firearms Talk is owned and operated by fellow firearms enthusiasts. We strive to offer a non-commercial community to learn and share information.

Join FirearmsTalk.com Today! - Click Here


Old 11-03-2013, 01:07 AM   #2
FTF_SUPPORTER.png
Feedback Score: 0 reviews
 
Mercator's Avatar
 
Join Date: Sep 2013
Location: Indiana
Posts: 4,269
Liked 1771 Times on 1217 Posts
Likes Given: 904

Default

Don't fire it. Have it inspected by a gunsmith.



__________________
Mercator is offline  
 
Reply With Quote
Old 11-03-2013, 01:29 AM   #3
Feedback Score: 0 reviews
 
Join Date: Sep 2012
Location: The Edge of Darkness
Posts: 6,495
Liked 4790 Times on 2679 Posts
Likes Given: 1736

Default

Some rifles will maintain accuracy with bulge. It depends if it has enough rifling after it passes the "Jump". The only real option is to have the barrel cut and crowned behind the bulge.
If the little Mauser is nice I would consider a new barrel turned to the original dimensions.

__________________
nitestalker is offline  
 
Reply With Quote
Old 11-03-2013, 02:20 AM   #4
Feedback Score: 0 reviews
 
hiwall's Avatar
 
Join Date: May 2011
Location: Cleator,AZ
Posts: 3,284
Liked 710 Times on 458 Posts
Likes Given: 227

Default

Quote:
Some rifles will maintain accuracy with bulge.
True.................................
__________________

Just walking on the edge of of my grave.

hiwall is offline  
 
Reply With Quote
Old 11-03-2013, 02:30 AM   #5
Moderator
FTF_MODERATOR.png
Feedback Score: 0 reviews
 
JonM's Avatar
 
Join Date: Nov 2009
Location: Rochester WI,Rochester WI
Posts: 17,414
Liked 5511 Times on 2878 Posts
Likes Given: 358

Default

i would say if its got enough length to stay legal have it choopped and crowned. a lot of those old war uns perform better with shorter barrels. it stiffens them and can improve accuracy and reduces heat buildup.

if its too far back to stay legal rebarrel it. i personally wouldnt shoot it with a bulge

__________________

"Gun control: The theory that a woman found dead in an alley, raped and strangled with her panty hose, is somehow morally superior to a woman explaining to police how her attacker got that fatal bullet wound." — L. Neil Smith

The problem with being stupid is you cannot simply decide to stop doing dumb things...

JonM is offline  
 
Reply With Quote
Old 11-03-2013, 02:36 AM   #6
Feedback Score: 0 reviews
 
Join Date: Sep 2012
Location: The Edge of Darkness
Posts: 6,495
Liked 4790 Times on 2679 Posts
Likes Given: 1736

Default

Very true. I would scope the bulge. If it has a metal fracture in the expanded area it may not be forgiving.

__________________
nitestalker is offline  
 
Reply With Quote
Old 11-14-2013, 09:17 PM   #7
Feedback Score: 0 reviews
 
dteed4094's Avatar
 
Join Date: May 2009
Posts: 773
Liked 54 Times on 40 Posts
Likes Given: 44

Default

If the .008 distortion is distributed in the entire circumference it is only about 1% but if is restricted to small portion of the circumference it can be at least 10% distortion. There is no way to know how much stress (pressure) it can withstand. You could shoot it once and have a catastrophic failure, or it may never fail. How much do you value your physical well being? I believe I heard that some of the Mex Mausers had questionable metal.



__________________

"War is an ugly thing, but not the ugliest of things. The decayed and degraded state of moral and patriotic feeling, which thinks nothing is worth war, is worse. A man who has nothing which he cares more about than his own personal safety is a miserable creature, and has no chance of being free unless he is made free and kept so by the exertions of better men than himself" John Stuart Mill
A government which robs Peter to pay Paul can always depend on the support of
Paul.

dteed4094 is offline  
 
Reply With Quote
Reply

Thread Tools
Display Modes


Similar Threads
Thread Thread Starter Firearms Forum Replies Last Post
Bulged Trunnion - Threaded Barrel starving030 AK & SKS Discussion 3 03-20-2013 09:27 PM
Free floating a barrel and glass bedding a barrel mountainskytop General Rifle Discussion 3 12-15-2012 07:19 PM
LW barrel vs. standard barrel... Broke124 AR-15 Discussion 2 12-02-2011 09:19 PM
barrel twist and barrel length Phadil Gunsmithing Forum 13 09-22-2010 04:58 PM
Which was invented first? The Double Barrel Shotgun or the Double Barrel Rifle? MP1000 General Shotgun Discussion 6 11-09-2009 09:16 PM