+ Reply to Thread
Page 2 of 2 FirstFirst 1 2
Results 11 to 20 of 20

Thread: Largest locking shoulder?

Click here to increase the font size Click here to reduce the font size
  1. #11
    Member kpj53's Avatar
    Join Date
    Mar 2017
    Last On
    Yesterday @ 12:51 AM
    Location
    SE US
    Posts
    27
    Local Date
    05-24-2018
    Local Time
    08:58 AM
    Thread Starter
    Quote Originally Posted by stencollector View Post
    So realizing that my numbers are substantially different from the others, I tried again measuring a different way. I put the flat of the shoulder against the caliper, and measured to the small edge. The 3X measured the largest again, and a bunch of the others ended up grouped together. Is this the method you guys used?

    In the first method, I measured from the bottom of the small edge to the highest lip. When I checked the overall heights of the locking edge, I realized this method really didn't measure the distance.

    Photo attached with the new measurements.
    Thats a little better

    Looks like I have one of the larger ones already at .832. I appreciate the time you put in. Most likely I'll have to have one welded up.

  2. # ADS
    Friends and Sponsors
    Join Date
    October 2006
    Location
    Milsurps.Com
    Posts
    All Threads
    No Drill-Tap scope mounts for Mosin Nagant, Mauser K98K, Yugo M48, Swedish M96 and M38, Swiss K31, K11, 1911 and more! Bringing mil-surplus rifles to modern standard without damaging historical values! LIMITED TIME OFFER FROM THE AMERICAN GUNSMITHING INSTITUTE: Get Immediate Online Access To AGI's NEW Armorer's Course for Glock Pistols, Covering Every Generation of Glocks, Including the Latest Model 42/43 and Double Stack Pistols for ONLY $7.00! Brian Dick ... BDL Ltd. - Specializing in British and Commonwealth weapons Chuck in Denver ... Buy-Sell-Trade .. Guns, Cars Motorcycles Service Publications - Collectors books that earn their place in your library! Your source for the finest in High Power Competition Gear. Canadian Import and Export Services (Click banner ad for more information) Here at T-bones Shipwrighting we specialise in vintage service rifle: re-barrelling, bedding, repairs, modifications and accurizing. We also provide importation services for firearms, parts and weapons, for both private or commercial businesses.
     

  3. #12
    Advisory Panel stencollector's Avatar
    Join Date
    Oct 2006
    Last On
    Today @ 02:59 AM
    Location
    Shilo MB
    Posts
    704
    Local Date
    05-24-2018
    Local Time
    08:58 AM
    I'll try and get back into the shed tomorrow or Saturday. I'm pretty sure I have a bunch more.

    Since the "large" ones are marked 3x, I suspect there are larger with the sizes 4, 5 and 6. Mind you, the measurements from BRP seem to be contrary to that theory.

  4. Avoid Ads - Become a Contributing Member - Click HERE
  5. #13
    Member kpj53's Avatar
    Join Date
    Mar 2017
    Last On
    Yesterday @ 12:51 AM
    Location
    SE US
    Posts
    27
    Local Date
    05-24-2018
    Local Time
    08:58 AM
    Thread Starter
    Quote Originally Posted by stencollector View Post
    I'll try and get back into the shed tomorrow or Saturday. I'm pretty sure I have a bunch more.

    Since the "large" ones are marked 3x, I suspect there are larger with the sizes 4, 5 and 6. Mind you, the measurements from BRP seem to be contrary to that theory.
    I'm pretty sure .834 is about as long as they get from the factory. From what I have read so far X3 is the largest but who knows. If you have the time take a look, even an .837 would help

  6. #14
    Really Senior Member TactAdv's Avatar
    Join Date
    Apr 2014
    Last On
    Today @ 03:25 AM
    Location
    NE Colorado, USA
    Posts
    200
    Local Date
    05-24-2018
    Local Time
    07:58 AM
    This brings up the obvious question, is there an original manufacturing drawing that specifies the "baseline" or "blank" dimensions for the locking shoulder to be used to grind all the registered sizes specified?

    They had to start with some form of blank that would have to have been long enough to grind to at least the longest registered size specified?

    That is the original information I'd like to see.
    -TomH

  7. #15
    Member kpj53's Avatar
    Join Date
    Mar 2017
    Last On
    Yesterday @ 12:51 AM
    Location
    SE US
    Posts
    27
    Local Date
    05-24-2018
    Local Time
    08:58 AM
    Thread Starter
    Quote Originally Posted by TactAdv View Post
    This brings up the obvious question, is there an original manufacturing drawing that specifies the "baseline" or "blank" dimensions for the locking shoulder to be used to grind all the registered sizes specified?

    They had to start with some form of blank that would have to have been long enough to grind to at least the longest registered size specified?

    That is the original information I'd like to see.
    -TomH
    Would be good to know the info but it seems the only way to know for sure is to measure, I have three X3 marked shoulders here now, they are all within .002 of each other one is new and two are used.

    I dont think the spread is that far, I would think whoever was doing the marking could be a bit off, thats why it was best to pick and choose between many.

  8. #16
    Really Senior Member Kev G's Avatar
    Join Date
    Mar 2008
    Last On
    03-13-2018 @ 04:26 PM
    Posts
    532
    Local Date
    05-24-2018
    Local Time
    01:58 PM

    I'll just drop this here.

    For reference -
    Attached Thumbnails Click image for larger version

Name:	LS2.jpg‎
Views:	94
Size:	215.4 KB
ID:	89580   Click image for larger version

Name:	LS1.jpg‎
Views:	93
Size:	256.5 KB
ID:	89579  

  9. The Following 3 Members Say Thank You to Kev G For This Useful Post:


  10. #17
    Advisory Panel
    Peter Laidler's Avatar
    Join Date
    Jul 2008
    Last On
    Yesterday @ 05:18 PM
    Location
    Abingdon, Oxfordshire. The home of MG Cars
    Posts
    15,572
    Local Date
    05-24-2018
    Local Time
    02:58 PM
    Have you just got these drawings KG - or had them some time. They seem to raise a couple of interesting but puzzling queries

  11. #18
    Really Senior Member nzl1a1collector's Avatar
    Join Date
    Aug 2008
    Last On
    Today @ 01:49 AM
    Location
    New Zealand
    Posts
    516
    Local Date
    05-25-2018
    Local Time
    01:58 AM
    ohh goodie those images will help id the 100 odd locking shoulders I found under a rock

  12. #19
    Really Senior Member Kev G's Avatar
    Join Date
    Mar 2008
    Last On
    03-13-2018 @ 04:26 PM
    Posts
    532
    Local Date
    05-24-2018
    Local Time
    01:58 PM
    Quote Originally Posted by Peter Laidlericon View Post
    Have you just got these drawings KG - or had them some time.
    Had them a few years now Pete ?

    ATB KG

  13. #20
    Member kpj53's Avatar
    Join Date
    Mar 2017
    Last On
    Yesterday @ 12:51 AM
    Location
    SE US
    Posts
    27
    Local Date
    05-24-2018
    Local Time
    08:58 AM
    Thread Starter
    Those drawings are interesting thanks for posting them.

    FWIW, after a welded locking shoulder wearing heavily after only 20 rounds I ended up cutting an .015 shim to put behind a new X3 shoulder, opened the screw hole .015 bit with a tiny bit of taper on the shoulder so it tightens snug against the shim. Put a small notch on the top of the shoulder and a small bend at the top of the shim to keep it from dropping out if it loosens, plus a little bit of loctite bearing mount between the shim and shoulder - I dont think it will ever go anywhere..

    200 rounds later all is fine and nothing has moved, shoulder screw is staying tight with some red loctite. Something I'll have to keep an eye on but I thought it was a better alternative than cutting down 3 barrels and custom making a barrel nut or trying to have a custom shoulder made.



    Was a little cold today (20 degrees F) but it was a good day to put 100 rounds through it to sight in all three barrels at 200 yards. My kid was freezing but the Bren worked 100%
    Attached Thumbnails Click image for larger version

Name:	IMG_180.jpg‎
Views:	35
Size:	130.1 KB
ID:	89803  

+ Reply to Thread
Page 2 of 2 FirstFirst 1 2

Similar Threads

  1. Bren locking shoulder size question
    By lima in forum The Bren LMG (Light Machine Gun)
    Replies: 13
    Last Post: 12-05-2014, 10:18 AM
  2. Ream or New Locking Shoulder
    By sundance8 in forum The Bren LMG (Light Machine Gun)
    Replies: 14
    Last Post: 01-22-2013, 12:56 PM
  3. Locking Shoulder question
    By Longshaor in forum The Bren LMG (Light Machine Gun)
    Replies: 2
    Last Post: 08-05-2010, 09:11 PM
  4. For our Canadian neighbors: we stood shoulder to shoulder then, just as today
    By Louis of PA in forum The Watering Hole OT (Off Topic) Forum
    Replies: 0
    Last Post: 07-12-2009, 12:15 AM
  5. Chamber shoulder and case shoulder gauge for .303?
    By NuJudge in forum The Lee Enfield Knowledge Library Collectors Forum
    Replies: 118
    Last Post: 06-11-2009, 12:30 PM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts