The Firing Line Forums

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

Reply
 
Thread Tools Search this Thread
Old January 19, 2013, 12:10 PM   #1
Hairbag
Senior Member
 
Join Date: October 22, 2010
Posts: 449
7.62x39 field guage

Can't find a dang 7.62x39 field guage (if they even exist) looked at brownells midway nada any help please!
__________________
I'm hairbag and I approve this message.
Hairbag is offline  
Old January 20, 2013, 02:27 AM   #2
Scorch
Senior Member
 
Join Date: February 13, 2006
Location: Washington state
Posts: 15,248
Call PTG.
__________________
Never try to educate someone who resists knowledge at all costs.
But what do I know?
Summit Arms Services
Scorch is offline  
Old January 22, 2013, 06:37 PM   #3
Hairbag
Senior Member
 
Join Date: October 22, 2010
Posts: 449
Manson reamers carries 7.62x39 field guage CIP and SAMMI $30 if anyone is interested.
__________________
I'm hairbag and I approve this message.
Hairbag is offline  
Old February 2, 2013, 01:01 AM   #4
F. Guffey
Senior Member
 
Join Date: July 18, 2008
Posts: 7,249
7.62x39 field guage

--------------------------------------------------------------------------------

Can't find a dang 7.62x39 field guage (if they even exist) looked at brownells midway nada any help please!

"please!"

Check the reloading forums, they have reloaders bumping? the shoulder precisely/exactly .004", or .006" etc. daily, nothing to it, a press, die and shell holder with miscellaneous tools.

I am not that stuck on my work, bump sounds like something that has to do with an accident.

Chamber length gages, I would neck up new 7.62x39 cases to 338 or 35 cal, then I would adjust the full length sizing die off the shell holder .010" then start sizing, after sizing the case with the die off the shell holder .010" I would decrease the gap to .008", I would continue decreasing the gap between the die and shell holder in increments of .002" until I had 5 cases that measured from full length sized/minimum to +.10".

Those with comparators could test the length of the case from the head of the case to the shoulder/datum of the case to verify the length of the case and its effect it has on offsetting the length of the chamber from the bolt face to the shoulder of the chamber.
I make gages, I make gages to measure the length of the case from the dead of the case to the datum.

Gap adjustment, I adjust the die off the shell with shell holder with a feeler gage, Redding calls the feeler gage a thickness gage. Adjust the die then secure the die to the press with the lock ring, hold the die to prevent turning then tighten the lock ring. After making the adjustment verify the gap with the feeler gage.

After sizing the cases the shortest case should chamber and allow the bolt to close without resistance, the longer cases should not allow the bolt to close.

F. Guffey
F. Guffey 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 07:38 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
This site and contents, including all posts, Copyright © 1998-2021 S.W.A.T. Magazine
Copyright Complaints: Please direct DMCA Takedown Notices to the registered agent: thefiringline.com
Page generated in 0.05191 seconds with 10 queries