AR chamber lapping/polishing - Pirate4x4.Com : 4x4 and Off-Road Forum
 
Pirate4x4.Com : 4x4 and Off-Road Forum  

Go Back   Pirate4x4.Com : 4x4 and Off-Road Forum > Miscellaneous > Outdoor Sports and Recreation
Notices

Reply
 
Share LinkBack Thread Tools Display Modes
Old 01-23-2017, 05:16 PM   #1 (permalink)
Registered User
 
Join Date: Nov 2006
Member # 82262
Location: Kingston, ON
Posts: 1,834
AR chamber lapping/polishing

I finally got my new barrel back from warranty but they sent the old one back too. After looking in the parts bin all I need is a stripped upper to build a complete upper.

The chamber was slightly too tight, what's the best way to go about safely opening it up.


And mock up of the new set up... just waiting for the kids to go to bed to actually install the barrel.


frumpy is offline   Reply With Quote Quick reply to this message
Old 01-23-2017, 06:51 PM   #2 (permalink)
Pirate4x4 Addict!
 
rockmup's Avatar
 
Join Date: Jan 2003
Member # 16699
Location: Greenwell Springs La.
Posts: 10,649
A chamber reamer would be the right way but you can epoxy a spent case to a short rod through the primer pocket, hand drill and some lapping compound.
rockmup is offline   Reply With Quote Quick reply to this message
Sponsored Links
Old 01-23-2017, 09:43 PM   #3 (permalink)
Pirate4x4 Addict!
 
Gozuki's Avatar
 
Join Date: Jan 2001
Member # 3088
Location: West Coast, USA
Posts: 17,753
Or Cratex, a rubberized abrasive on a dremel mandrel would also work well.
__________________
Quote:
Sometimes a two foot level is not handy, but usually there's some ground around.
Gozuki is offline   Reply With Quote Quick reply to this message
 
Old 01-24-2017, 08:14 AM   #4 (permalink)
Surgical Shotgunner
 
Texas97's Avatar
 
Join Date: Mar 2008
Member # 111524
Location: Texas... we dont F*&*% around
Posts: 15,676
can you expand on "chamber was slightly too tight"?

was it too tight to eject a case? too tight to load a case? over pressure signs in the brass?
__________________
shhhh.....
Texas97 is offline   Reply With Quote Quick reply to this message
Old 01-24-2017, 10:31 AM   #5 (permalink)
Registered User
 
Join Date: Nov 2006
Member # 82262
Location: Kingston, ON
Posts: 1,834
Quote:
Originally Posted by Texas97 View Post
can you expand on "chamber was slightly too tight"?

was it too tight to eject a case? too tight to load a case? over pressure signs in the brass?
Too tight to eject
frumpy is offline   Reply With Quote Quick reply to this message
Old 01-24-2017, 02:44 PM   #6 (permalink)
Registered User
 
kf4zht's Avatar
 
Join Date: Oct 2006
Member # 80248
Location: Calhoun, GA
Posts: 1,274
Have you chamber cast to see where the issue is in the chamber?

You can rent a real reamer from 4d cheap to do it right
__________________
Where there is a way, there's a will.
kf4zht is offline   Reply With Quote Quick reply to this message
Old 01-24-2017, 05:25 PM   #7 (permalink)
Registered User
 
Join Date: Nov 2006
Member # 82262
Location: Kingston, ON
Posts: 1,834
That's an awesome idea but unfortunately they don't ship to Canada. Haven't done a chamber cast.
frumpy is offline   Reply With Quote Quick reply to this message
Old 01-24-2017, 07:35 PM   #8 (permalink)
Registered User
 
Join Date: Jun 2016
Member # 684666
Posts: 1,499
Was the case gouged or deformed at all? How far off are we talking? If it loads a round but won't eject there should be signs of something holding it in place on the brass. Obviously you got the round out that was stuck, what did it look like?
jedijesus2 is offline   Reply With Quote Quick reply to this message
Old 01-24-2017, 08:20 PM   #9 (permalink)
Registered User
 
kf4zht's Avatar
 
Join Date: Oct 2006
Member # 80248
Location: Calhoun, GA
Posts: 1,274
Quote:
Originally Posted by frumpy View Post
That's an awesome idea but unfortunately they don't ship to Canada. Haven't done a chamber cast.
That sucks. I know ptg almost always has 223/556 reamers on clearance, guess they sell so many. A Manson solid pilot is 100 and they will ship internationally
Quote:
Originally Posted by jedijesus2 View Post
Was the case gouged or deformed at all? How far off are we talking? If it loads a round but won't eject there should be signs of something holding it in place on the brass. Obviously you got the round out that was stuck, what did it look like?
Cerrosafe and equivalents are pretty cheap on ebay, or just sharpie the crap out of a case. It would tell you better if the issue was something like a burr or something bigger like the neck being too tight
__________________
Where there is a way, there's a will.
kf4zht is offline   Reply With Quote Quick reply to this message
Old 01-24-2017, 09:16 PM   #10 (permalink)
Registered User
 
melbakid's Avatar
 
Join Date: Nov 2016
Member # 719362
Location: Southwest Idaho
Posts: 12
I have used a chamber hone for a .357 Mag revolver cylinder in the past with excellent results. It looks like the hones you use on engine cylinders. They are available from Brownells.com in Iowa. You will need to get some of the special honing oil that is sold to use with it. If you use anything else it will destroy the hone. Ask me how I know. Also you need to know if the chamber is chrome lined, if it is, forget the hone, you will destroy it in short time!!

This was recommended by Glen Zediker who has written several books on reloading and AR-15 building. His book on AR-15 builds is really worth the money. He covers just about anything you would want to know about AR's. He has two books out on AR's, you want the one with the red cover. It is an excellent step by step with pictures kind of book.
__________________
There are only 2 kinds of 4x4's: those we want and those we need.
melbakid is offline   Reply With Quote Quick reply to this message
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Pirate4x4.Com : 4x4 and Off-Road Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.

** A VERIFICATION EMAIL IS SENT TO THIS ADDRESS TO COMPLETE REGISTRATION!! **

Email Address:
Insurance
Please select your insurance company (Optional)

Log-in


Thread Tools
Display Modes

Posting Rules
You may post new threads
You may 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
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -7. The time now is 03:09 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.0 ©2011, Crawlability, Inc.
User Alert System provided by Advanced User Tagging (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.