The Firing Line Forums

Go Back   The Firing Line Forums > The Skunkworks > The Smithy

Reply
 
Thread Tools Search this Thread
Old May 26, 2019, 09:01 AM   #1
SEHunter
Senior Member
 
Join Date: October 6, 2009
Posts: 306
Remington 870 jams

I have a 15 year old 870 that I bought the mossberg made 18-1/2” cylinder bore replacement barrel for about the same time I bought the gun. Just about every 5th or 6th round, the spent shell jams in the barrel and I have to hit the butt stock on the ground so I can extract the shell.

Question is if it’s a possibility I need to have a smith ream out the barrel where the brass lays. With the barrel removed, a non fired shell easily falls in and out of the barrel but a spent shell is snug, some too snug to remove without prying our with a screwdriver. To a degree I’m sure it’s normal for the brass to stretch, my question is how much. The OD of a new shell at the brass is about .803" and spent shells range from .812” to .815” with a dial caliper. The barrel is about .806". I don’t recall the factory 28” barrel doing this. Shells are Winchester universal 2-3/4” x 1-1/8 oz.
SEHunter is offline  
Old May 26, 2019, 04:01 PM   #2
SEHunter
Senior Member
 
Join Date: October 6, 2009
Posts: 306
Turns out a quick google search shows this is something a lot of people have experienced and many have had success smoothing and buffing out the part of the barrel chamber where it meets the shell brass. I believe it’s a combination of poor machining and cheap shells. Either way I’ll probably attempt to use a dremmel tool with a buffing wheel to polish it up a little.
SEHunter is offline  
Old May 26, 2019, 06:39 PM   #3
jmr40
Senior Member
 
Join Date: June 15, 2008
Location: Georgia
Posts: 9,521
A little steel wool to smooth out the chamber will probably do the trick
__________________
"If you're still doing things the same way you were doing them 10 years ago, you're doing it wrong"

Winston Churchill
jmr40 is offline  
Old May 27, 2019, 07:08 AM   #4
dahermit
Senior Member
 
Join Date: October 28, 2006
Location: South Central Michigan...near
Posts: 5,547
Quote:
I believe it’s a combination of poor machining and cheap shells.
Explain if you will, how "cheap shells" could make a difference with extraction. Ask'en for a friend.
__________________
When you seek advice it is spelled with a "c". In case anyone really wanted to know, and even if you didn't.
Lookup "run" in the dictionary...you will find that it is not a synonym for "function", "shoot", or "use". If you live in the U.S.A, learn to speak English.
dahermit is offline  
Old May 27, 2019, 11:14 AM   #5
tangolima
Senior Member
 
Join Date: September 28, 2013
Posts: 2,157
Is the extractor fitted correctly?

-TL

Sent from my SM-G930T using Tapatalk
tangolima is offline  
Old May 27, 2019, 12:53 PM   #6
T. O'Heir
Senior Member
 
Join Date: February 13, 2002
Location: Canada
Posts: 11,030
"...attempt to use a dremmel(SIC) tool..." Do not use any kind of rotary tool. Far too easy to make the chamber oval.
"...about every 5th or 6th round..." That indicates it's more likely the ammo and not the barrel. Change ammo before you do anything.
Any rough spots in the chamber should be visible.
__________________
Spelling and grammar count!
T. O'Heir is offline  
Old May 27, 2019, 06:19 PM   #7
SEHunter
Senior Member
 
Join Date: October 6, 2009
Posts: 306
I’ll probably actually call my local Smith first to ask his opinion. I honestly don’t mind paying a few bucks for him to mic the chamber and hone some if needed.

I say cheap shells are possibly the problem in part because I read on another shooting forum that Winchester universal shells have been notorious for that in tighter chambers. If the brass is thinner than a high end shell, it’s reasonably believable that it could stretch more than it should when fired. I may switch back to bulk Remington or federal shells.
SEHunter is offline  
Old May 27, 2019, 06:38 PM   #8
SEHunter
Senior Member
 
Join Date: October 6, 2009
Posts: 306
Although after thinking about it, if it’s the ammo, enlarging the chamber in that area may not be the best idea. For all I know, the cheap ammo would continue to swell with the new chamber dimension and possibly even split. Then I may potentially ruin quality hulls if i plan to reload.

https://www.shotgunworld.com/bbs/vie...p?f=2&t=425300
SEHunter is offline  
Old May 27, 2019, 06:50 PM   #9
dahermit
Senior Member
 
Join Date: October 28, 2006
Location: South Central Michigan...near
Posts: 5,547
Quote:
If the brass is thinner than a high end shell, it’s reasonably believable that it could stretch more than it should when fired.
Actually, the brass, a very soft, ductile metal, contributes no strength to the shotshell casing and is only necessary on a shotshell to provide a metal rim for extraction. There have been shot shells that were (I do not know if they still make them), all plastic, no brass at all. Note that at one time, shotshells were made of paper. If the extractor is not ripping through the brass rim on that 870, it is not "cheap" shot shells are not the likely cause of the malfunction.
In short, a malfunction as described by the orginal poster has a specific cause, and cannot be logically dismissed as being caused by "cheap ammo"...which is more of a platitude rather than a specific fault.
Nevertheless, if you care to take apart some of those "cheap" shells and measure the thickness of the brass compared to more expensive shells, and a Brinell hardness test would also be nice, if you find any significant difference, I will be very happy to concede that I have been wrong about "cheap" shells.
__________________
When you seek advice it is spelled with a "c". In case anyone really wanted to know, and even if you didn't.
Lookup "run" in the dictionary...you will find that it is not a synonym for "function", "shoot", or "use". If you live in the U.S.A, learn to speak English.

Last edited by dahermit; May 27, 2019 at 06:56 PM.
dahermit is offline  
Old May 27, 2019, 09:03 PM   #10
FITASC
Senior Member
 
Join Date: December 6, 2014
Posts: 4,990
Quote:
Explain if you will, how "cheap shells" could make a difference with extraction. Ask'en for a friend.
Cheap shells have steel bases which expand but do not necessarily retract the way brass does. If there are slight imperfections, such as tiny burrs or similar, the base sticks, making extraction difficult.
__________________
"I believe that people have a right to decide their own destinies; people own themselves. I also believe that, in a democracy, government exists because (and only so long as) individual citizens give it a 'temporary license to exist'—in exchange for a promise that it will behave itself. In a democracy, you own the government—it doesn't own you."- Frank Zappa
FITASC is offline  
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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 -5. The time now is 02:40 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
This site and contents, including all posts, Copyright © 1998-2018 S.W.A.T. Magazine
Copyright Complaints: Please direct DMCA Takedown Notices to the registered agent: thefiringline.com
Contact Us
Page generated in 0.06957 seconds with 9 queries