+ Reply to Thread
Page 1 of 2 1 2 LastLast
Results 1 to 10 of 20

Thread: S&W Brazilain Contract Fail to Fire on 6th round in Double Action

Click here to increase the font size Click here to reduce the font size
  1. #1
    FREE MEMBER
    NO Posting or PM's Allowed
    wtr100's Avatar
    Join Date
    Mar 2011
    Last On
    07-21-2011 @ 11:09 AM
    Location
    il
    Posts
    4
    Local Date
    03-29-2024
    Local Time
    01:40 AM

    S&W Brazilain Contract Fail to Fire on 6th round in Double Action

    This revolver was giving me light primer strikes in Double Action. I installed a Cylinder and Slide .002 end shake bearing and now it will fire 5 rounds DA then it will not fire DA until I fire one round SA. Once I do fire SA it will fire again. It does this with both factory loads and reloads are are more or less duplicates of factory. It also does this with a variety of moon and half moon clips.

    I've also installed a new wolf main spring and put a shim (fired primer) over the set screw.

    Anyone got thoughts on this?
    Information
    Warning: This is a relatively older thread
    This discussion is older than 360 days. Some information contained in it may no longer be current.

  2. # ADS
    Friends and Sponsors
    Join Date
    October 2006
    Location
    Milsurps.Com
    Posts
    All Threads
    A Collector's View - The SMLE Short Magazine Lee Enfield 1903-1989. It is 300 8.5x11 inch pages with 1,000+ photo’s, most in color, and each book is serial-numbered.  Covering the SMLE from 1903 to the end of production in India in 1989 it looks at how each model differs and manufacturer differences from a collecting point of view along with the major accessories that could be attached to the rifle. For the record this is not a moneymaker, I hope just to break even, eventually, at $80/book plus shipping.  In the USA shipping is $5.00 for media mail.  I will accept PayPal, Zelle, MO and good old checks (and cash if you want to stop by for a tour!).  CLICK BANNER to send me a PM for International pricing and shipping. Manufacturer of various vintage rifle scopes for the 1903 such as our M73G4 (reproduction of the Weaver 330C) and Malcolm 8X Gen II (Unertl reproduction). Several of our scopes are used in the CMP Vintage Sniper competition on top of 1903 rifles. Brian Dick ... BDL Ltd. - Specializing in British and Commonwealth weapons Specializing in premium ammunition and reloading components. Your source for the finest in High Power Competition Gear. 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. #2
    Advisory Panel

    jmoore's Avatar
    Join Date
    Mar 2009
    Last On
    06-09-2023 @ 04:20 AM
    Location
    US of A
    Posts
    7,066
    Local Date
    03-29-2024
    Local Time
    02:40 AM
    Have you measured how much end shake remains after installing the "bearing"/shim? Also what's the actual head clearance (i.e. gap between the end of the case and the recoil shield with the case fully forward.) How's the timing? Does the firing pin fully protrude through the recoil shield when the trigger is pulled? I'm not sure that the modern mainspring is the best choice- put the original one back in, unless there's something wrong with it. That's just stuff that occurred to me for starters, there's plenty else, but 15-30 seconds "hands-on" is apt to turn into days worth of posts on-line. It might be best to find someone local who really knows vintage Smith and Wessons if you can!

    Quite the involved first post! Welcome aboard.


  4. Avoid Ads - Become a Contributing Member - Click HERE
  5. #3
    Advisory Panel browningautorifle's Avatar
    Join Date
    Jul 2008
    Last On
    Today @ 12:49 AM
    Location
    Victoria BC
    Posts
    29,839
    Real Name
    Jim
    Local Date
    03-28-2024
    Local Time
    11:40 PM
    Sometimes the mainspring will knucke. That is to say the top end where the claws are will actually bend a bit toward the hammer. This will decrease the spring tension. I've had it happen to brand new springs, usually when single actioning a revolver. Also if you load your own use Federal 150 primers and this problem will likely end. Like J says, if I had it in my hands for a minute this would be over. Also remember, this revelver was made for which contract? 1937? Mine was and it had seen a better life years ago. I bought a 625 and sold the 1917. No more problems.
    Regards, Jim

  6. #4
    Legacy Member Bruce McAskill's Avatar
    Join Date
    Mar 2009
    Last On
    01-17-2023 @ 09:10 PM
    Posts
    1,880
    Local Date
    03-29-2024
    Local Time
    01:40 AM
    Since you installed an end shake bearing,can you still move the cylinder forward and backward?

  7. #5
    FREE MEMBER
    NO Posting or PM's Allowed
    wtr100's Avatar
    Join Date
    Mar 2011
    Last On
    07-21-2011 @ 11:09 AM
    Location
    il
    Posts
    4
    Local Date
    03-29-2024
    Local Time
    01:40 AM
    Thread Starter
    Quote Originally Posted by Bruce McAskill View Post
    Since you installed an end shake bearing,can you still move the cylinder forward and backward?
    very slightly - I tried a second bearing but it was too snug

  8. #6
    Advisory Panel

    jmoore's Avatar
    Join Date
    Mar 2009
    Last On
    06-09-2023 @ 04:20 AM
    Location
    US of A
    Posts
    7,066
    Local Date
    03-29-2024
    Local Time
    02:40 AM
    Get some feeler gages at least to check the head clearance.

    I'm still pretty sure that the newer model mainsprings aren't compatible with the pre- WWII revolvers. I think the mainspring length changed enough to mess with the proper hammer swing. See browningautorifleicon's post above. If it is wrong the "feel" when bring the hammer to full cock won't be uniform. I'm sure I've encountered this before, but don't remember if the old spring is longer or shorter. Also if the spring hits a grip screw it'll mess things up.

  9. #7
    FREE MEMBER
    NO Posting or PM's Allowed
    wtr100's Avatar
    Join Date
    Mar 2011
    Last On
    07-21-2011 @ 11:09 AM
    Location
    il
    Posts
    4
    Local Date
    03-29-2024
    Local Time
    01:40 AM
    Thread Starter
    Quote Originally Posted by jmoore View Post
    Get some feeler gages at least to check the head clearance.

    I'm still pretty sure that the newer model mainsprings aren't compatible with the pre- WWII revolvers. I think the mainspring length changed enough to mess with the proper hammer swing. See browningautorifleicon's post above. If it is wrong the "feel" when bring the hammer to full cock won't be uniform. I'm sure I've encountered this before, but don't remember if the old spring is longer or shorter. Also if the spring hits a grip screw it'll mess things up.
    put the old spring back in - left the fired primer as a shim over the strain screw and perfect

    all primers have even and authoritative primer strikes

  10. #8
    Advisory Panel browningautorifle's Avatar
    Join Date
    Jul 2008
    Last On
    Today @ 12:49 AM
    Location
    Victoria BC
    Posts
    29,839
    Real Name
    Jim
    Local Date
    03-28-2024
    Local Time
    11:40 PM
    Off to the range with ya!
    Regards, Jim

  11. #9
    Advisory Panel

    jmoore's Avatar
    Join Date
    Mar 2009
    Last On
    06-09-2023 @ 04:20 AM
    Location
    US of A
    Posts
    7,066
    Local Date
    03-29-2024
    Local Time
    02:40 AM
    Parts interchange on Smiths of varying vintages needs it's own spreadsheet. It's even tricky on the numbered and "dashed" variations.

    A range report WOULD be most welcome!

  12. #10
    FREE MEMBER
    NO Posting or PM's Allowed
    wtr100's Avatar
    Join Date
    Mar 2011
    Last On
    07-21-2011 @ 11:09 AM
    Location
    il
    Posts
    4
    Local Date
    03-29-2024
    Local Time
    01:40 AM
    Thread Starter
    Quote Originally Posted by jmoore View Post
    Parts interchange on Smiths of varying vintages needs it's own spreadsheet. It's even tricky on the numbered and "dashed" variations.

    A range report WOULD be most welcome!
    Some old pics





    I put 48 rounds of 255 gr cast reloads through it last night w/o a hitch. It shoots straighter than I can hold it still

+ Reply to Thread
Page 1 of 2 1 2 LastLast

Similar Threads

  1. Colt's Double Action Revolver, Model of 1909, .45 cal.
    By jmoore in forum Other Military Service Pistols and Revolvers
    Replies: 14
    Last Post: 04-27-2011, 09:40 PM
  2. Working the Smith & Wesson .38 Double-Action Perfected Model
    By Newsfeed Hound in forum The Watering Hole OT (Off Topic) Forum
    Replies: 0
    Last Post: 01-27-2011, 01:50 AM
  3. Working Colt's Model 1877 Double-Action Revolvers
    By Newsfeed Hound in forum The Watering Hole OT (Off Topic) Forum
    Replies: 0
    Last Post: 08-18-2010, 06:40 PM
  4. SC sets fire to affirmative action/sotomayor.
    By BruceV in forum The Watering Hole OT (Off Topic) Forum
    Replies: 2
    Last Post: 06-29-2009, 01:56 PM
  5. Photos, the uploads just fail.
    By Lancebear in forum M1903/1903A3/A4 Springfield Rifle
    Replies: 4
    Last Post: 03-06-2009, 01:31 AM

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
Raven Rocks