+ Reply to Thread
Page 1 of 2 1 2 LastLast
Results 1 to 10 of 13

Thread: Increased dwell time

Click here to increase the font size Click here to reduce the font size
  1. #1
    Legacy Member Garandrew's Avatar
    Join Date
    Mar 2009
    Last On
    12-16-2023 @ 01:09 AM
    Location
    Conn.
    Posts
    755
    Real Name
    Andy Gordon
    Local Date
    10-31-2024
    Local Time
    07:13 PM

    Increased dwell time

    All 5 of my carbines are like this..too early for the later increased dwell time..
    I imagine overhauls would have received the updated change
    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
    FREE MEMBER
    NO Posting or PM's Allowed
    Tired Retired's Avatar
    Join Date
    Mar 2009
    Last On
    07-02-2014 @ 10:58 PM
    Location
    Fort Worth Texas
    Posts
    1,006
    Local Date
    10-31-2024
    Local Time
    06:13 PM
    Garandrew, I do not understand your question... Are you asking if you can update your shooters to increase the dwell time? Yes, just change to a type V or VI slide. I have also changed to later round bolts in my shooters - mainly to save the wear on the collectable flat bolts.

  4. Avoid Ads - Become a Contributing Member - Click HERE
  5. #3
    Legacy Member Garandrew's Avatar
    Join Date
    Mar 2009
    Last On
    12-16-2023 @ 01:09 AM
    Location
    Conn.
    Posts
    755
    Real Name
    Andy Gordon
    Local Date
    10-31-2024
    Local Time
    07:13 PM
    Thread Starter
    No, as an original carbine, I want it as it is, but if they were overhauled, they would have received new slides?

  6. #4
    Legacy Member DaveHH's Avatar
    Join Date
    Mar 2009
    Last On
    04-22-2024 @ 04:12 PM
    Location
    Northern Calif
    Posts
    1,348
    Real Name
    David Haynes
    Local Date
    10-31-2024
    Local Time
    06:13 PM
    I don't think that from a function standpoint it makes much difference. It was just an upgrade like many they did. I suspect anticipation of the full auto feature may have been part of it? My Win has a type 4 slide and functions flawlessly always has.

  7. #5
    FREE MEMBER
    NO Posting or PM's Allowed
    CrossedCannons's Avatar
    Join Date
    Jan 2010
    Last On
    08-20-2017 @ 08:56 AM
    Location
    Horse country, AZ
    Posts
    351
    Local Date
    10-31-2024
    Local Time
    04:13 PM
    Keeping the bolt locked after firing for an extra 0.25 msec apparently helped enough to eliminate breech flash and improve extraction for the design to stick as "7160091". I've never seen breech flash from my guns (semiautos w/ mostly early slides) though, even at night.

  8. #6
    Legacy Member BrianQ's Avatar
    Join Date
    Mar 2009
    Last On
    08-21-2022 @ 04:50 PM
    Posts
    466
    Local Date
    10-31-2024
    Local Time
    07:13 PM
    If you're asking if a depot would have made changes to the slide itself the answer is probably not. Older slides without the increased dwell were used along with ones that did have the increased dwell during rebuild. From a functionality standpoint the increased dwell does make a difference, that's why they increased the dwell in the first place. Not all type V slide have the increased dwell so simply changing to a type V slide won't change the timing unless it is one of the slides with the increased dwell. As pointed out in the article there are earlier type slides that also have the increased dwell.

  9. Thank You to BrianQ For This Useful Post:


  10. #7
    Legacy Member Garandrew's Avatar
    Join Date
    Mar 2009
    Last On
    12-16-2023 @ 01:09 AM
    Location
    Conn.
    Posts
    755
    Real Name
    Andy Gordon
    Local Date
    10-31-2024
    Local Time
    07:13 PM
    Thread Starter
    Thankyou...

  11. #8
    FREE MEMBER
    NO Posting or PM's Allowed
    Tired Retired's Avatar
    Join Date
    Mar 2009
    Last On
    07-02-2014 @ 10:58 PM
    Location
    Fort Worth Texas
    Posts
    1,006
    Local Date
    10-31-2024
    Local Time
    06:13 PM
    The TM9-1276 (1953), page 80-81 states (paraphase) that when inspecting shows that a slide needs replacing, use the Type V (7160091 - preferred) or the Type VI (5337151 - useable) until exhausted. The Type VI (7161843) was authorized, but was supposed to be reserved for M2's until the type VI's and V's were exhausted in the supply system. The tech manual itself neither identifies nor talks about the differences which create the increase dwell time.

    The dwell time was creased by changing the deminsion on two cuts on a slide - one increased the size of the cam cutout and the other decreased the width of the area the piston strikes. The easiest way to detect it is measure. On the bottom of the slide, measure the distance between the hole where the bottom of the slide stop comes out and the rear of the cam cut-out. The slide without the cut has a distance of about .100". Slides cut to have the increased dwell time have much smaller distance of about .050". As far as the Type V's which do have the cuts, GENERALLY it was the ones with the 7160091 part number stamped on them - BUT - as Brian said, not all Type V's have the cuts.

    (Thanks Brian for keeping me honest....)
    Last edited by Tired Retired; 01-20-2011 at 10:46 PM.

  12. #9
    Moderator
    (Deceased Nov 16th, 2019)

    JimF4M1s (Deceased)'s Avatar
    Join Date
    Mar 2009
    Last On
    01-14-2023 @ 10:08 PM
    Location
    USA
    Age
    75
    Posts
    3,439
    Local Date
    10-31-2024
    Local Time
    04:13 PM
    I am guessing, the January 2011 Carbine Club newsletter #363 that just came out two weeks ago, prompted this thread. There is a three page article on Changes in Late Operating Slides. Didn't say who wrote it, but whoever, did a great job.

    To those scratching their head and not understanding the meaning of Garandrew's picture and statement. This issue of the newsletter has detailed pictures and explanations. The newsletters are such a vast wealth of information. Just another reason to think about joining, and maybe not scrach your hair out. Heck, at our age most can't afford to lose anymore hair.

  13. #10
    Legacy Member BrianQ's Avatar
    Join Date
    Mar 2009
    Last On
    08-21-2022 @ 04:50 PM
    Posts
    466
    Local Date
    10-31-2024
    Local Time
    07:13 PM
    Newscotlander wrote the article.

+ Reply to Thread
Page 1 of 2 1 2 LastLast

Similar Threads

  1. War time Pix
    By FTD1167 in forum M1/M2 Carbine
    Replies: 3
    Last Post: 01-15-2011, 01:47 PM
  2. Time-Outs?
    By phil441 in forum Q&A - MILSURPS.COM
    Replies: 1
    Last Post: 09-12-2010, 07:37 AM
  3. At this time we should remember ..........
    By Gibbs505 in forum Book and Video Review Corner
    Replies: 3
    Last Post: 06-06-2009, 03:25 PM
  4. Time for this...again.
    By Nate in forum Other U.S. Service Rifles
    Replies: 4
    Last Post: 05-09-2009, 02:44 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