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New to The 10 Ring

Discussion in 'The 10 Ring' started by Green Mountain Boy, May 2, 2013.

  1. vaquero aleman

    vaquero aleman "ah-lay-mahn"

    1,005
    22
    Jan 9, 2009
    The Wild Wild West
    My ftf's were caused by the brass getting hung in my lwd barrel chamber. I have been told that lwd's chambers have been known to be out of spec.
     
  2. vaquero aleman

    vaquero aleman "ah-lay-mahn"

    1,005
    22
    Jan 9, 2009
    The Wild Wild West
    Your failure sounds like a slide speed issue, too fast. JMO.
     


  3. I agree 100% which is why I was shocked when the 21lb spring didn't solve the issue on the first batch and the second batch ran flawlessly.

    My plan is to order a good stock from Kevin once it is available and test a mag full from each box I receive to verify that there is no problem with any of them. That way I have a supply I can depend on for sure.

    Regards, GMB
     
  4. dryfly

    dryfly Platinum Member

    3,039
    788
    Nov 25, 2009
    White Mountains NH
    I just ran a few mags full of Underwoods 200 xtp's thru my stock Gen 3 29sf ..... no problems. The one issue I have is I am running low on the stuff.....
     
  5. Taterhead

    Taterhead Counting Beans

    3,595
    106
    Dec 13, 2008
    Boise, Idaho
    The heavier spring is causing a reduced amount of dwell time when the slide is back, and then a faster slide return. Accordingly, the slide is getting there before the next round is lifted into position. Instead of collecting the next round on the rim, it is bumping into it on the side of the case. I had similar failures with hot ammo and a heavier spring.

    In my G20, hot ammo + heaver springs = failures to feed. It also means sharper recoil impulses and a more abrupt forward return.

    Hot ammo, warm ammo, or wimpy ammo with the stock spring = 100% function.
     
    Last edited: Jun 11, 2013
  6. Yup. My factory barrels and springs have been 110% reliable in my 20SF and 29SF. Zero problems with warm or hot loads. Zero problems with feeding or ejection. Zero problems with my hand loads, factory stuff or underwood stuff. And zero issues with the fabled smilies. I've reloaded my Starline cases after use in the stock barrel and have had no problems at all. Because I carry my Tens almost daily for SD and HD, I won't have an aftermarket setup in these guns. I learned my lesson years ago about trying to buy "better" parts. Anything internal has never worked out and has always ended up in the scrap box to be given away to friends.
     
    Last edited: Jun 12, 2013
  7. That is my exact opposite experience. The weaker spring was causing me issues and heavy spring plus new batch of ammo seems to have solved it.
     
  8. ModGlock17

    ModGlock17

    4,147
    1,116
    Dec 18, 2010
    DisneyWorld
    I am curious. If you still have both the old and the new unfired rounds from UW, please measure the overall length of the cartridge. I would assume not, but verify that he didn't change it... Making it shorter or longer...

    Also, my experience with recoil springs is that after some 100-200 rounds, they'd become reliable... Less stiff at the compressed end.
     
  9. _The_Shadow

    _The_Shadow Ret. Fireman

    4,519
    21
    Jul 23, 2007
    Southeast, LoUiSiAna
    Most of the rounds from Underwood's I measured prior to the pull-downs were 155's, 165's & 180's were 1.2520" - 1.2525".
    The 180gr XTP was 1.2590" the 165 Gold Dot 1.2500"

    Most recent 180gr Speer TMJ 1.2445"

    All of the data is posted over at 10mmFirearms.com in the pull-down areas. http://10mm-firearms.com/index.php
     
  10. ModGlock17

    ModGlock17

    4,147
    1,116
    Dec 18, 2010
    DisneyWorld
    Thx, Shadow. I was curious whether the ammo that didn't feed well was an aberration of their normal mfg measurement. Thus if he corrected them to his normal mfg OAL target, probably close to 1.250", it worked. A date code on the box, a required record by ATF license, would have given him traceability to see if they were on mfg target. That's what I was wondering about.
     
  11. I gave the brass to a buddy to reload. Kevin from underwood stated that ammo went out with a crimp issue.

    Regards, GMB