Technical Question for the S&W 44 owners

Discussion in 'Centerfire Pistols & Revolvers' started by mesinge2, Sep 13, 2010.

  1. mesinge2

    mesinge2 Active Member

    609
    Dec 4, 2009
    Central Florida
    I recently bought a 3" S&W model 629 Talo Edition (http://www.thefirearmsforum.com/showthread.php?p=670058#post670058)

    Well, I went shooting for the second time and after cleaning of the usual burns on the outside of the cylinder I noticed that there were small pits in front of each chamber. I marked them on the following image (it was hard to see in the image). They are very small, equal in size, and on the outside of every chamber.

    Is this normal?
    Will they get deeper?


    I have never noticed this on my Ruger Redhawk or S&W model 29 (but they both have longer barrels).

    Is this a result of the shorter barrel?
    Will this problem worsen or ultimately damage the weapon?


    FYI, I only used standard pressure factory ammo.


    44 Magnum S&W Model 629-9 Deluxe Talo Edition  location of piting.jpg
     
    Last edited: Sep 13, 2010
  2. johnlives4christ

    johnlives4christ Former Guest

    Apr 28, 2008
    Kentucky
    i dont see an image of it. but pits in the chamber are not normal.
     

  3. armedandsafe

    armedandsafe Guest

    The image didn't make it.

    Pops
     
  4. armedandsafe

    armedandsafe Guest

    Now it shows. :D

    I can't really see them well enough to tell anything, Try it again, without flash.

    From the location you are indicating, on the outside of the cylinder, nothing there would be affected by long or short barrel. If you are indicating where you see pits inside the cylinder, that is another story.

    Pops
     
  5. mesinge2

    mesinge2 Active Member

    609
    Dec 4, 2009
    Central Florida
    No they are on the outside of the cylinder. Prior to my cleaning half the cylinder was burned black.

    It took me an hour to remove the burns with Hoppe's

    -
     
    Last edited: Sep 13, 2010
  6. johnlives4christ

    johnlives4christ Former Guest

    Apr 28, 2008
    Kentucky
    from your description, i believe the pits are inside the chamber... but i could be wrong.

    there shouldnt be any pits though inside the chambers from firing. are you sure that it's pits, and not some type of build up?
     
  7. mesinge2

    mesinge2 Active Member

    609
    Dec 4, 2009
    Central Florida
    Nope. Its like they are little holes (they look like tiny dents) on the outside of the chambers.

    It you move a finger nail on the outside of the cylinder it will stick in the "hole/pit/dent" thing.

    I will remark that they are very small, maybe 1mm at most. But they are symetrically placed in the front of every chamber.
     
    Last edited: Sep 13, 2010
  8. johnlives4christ

    johnlives4christ Former Guest

    Apr 28, 2008
    Kentucky
    odd, i have never heard of that before. i will say they are not from firing, the cylinder will not touch the frame either top or bottom. i would guess that it is an err from manufacturing.
     
  9. mesinge2

    mesinge2 Active Member

    609
    Dec 4, 2009
    Central Florida
    I could swear they weren't there before I fired, but I could be wrong.
    It is so weird I have been using revolvers in large bore calibers all my life and I have never seen this either.

    My only thought is a question: Could this be caused by the gap between the cylinder and the forcing cone being too large?

    A kind of flame cutting from escaping gases enveloping the cylinder?
     
    Last edited: Sep 13, 2010
  10. johnlives4christ

    johnlives4christ Former Guest

    Apr 28, 2008
    Kentucky
    i dont think it could be flame cutting. it could be that you only now are noticing it but it's been there the whole time. i dont know though, i've never had a 44 magnum revolver.
     
  11. the small pits are probably from too much clearance between the cylinder and forcing cone.this will allow hot gasses to come back against the frt of the cylinder.i have seen them before and usually if you dont wait too long they are easily removed.i would suggest cleaning both the frount of the forcing cone and the frt of cylinders. using an automotive type feeler gauge mic the clearence between them.i try and keep mine between 2 1/2 tight to four thousands of an inch.i would suggest if it is way over to take it to a good gunsmith and see if it cant be shimmed. old semperfi
     
  12. mesinge2

    mesinge2 Active Member

    609
    Dec 4, 2009
    Central Florida
    old semperfi, will firing it in this condition damage the weapon over time?
     
  13. John'sWife

    John'sWife Former Guest

    33
    Sep 22, 2009
    i've never heard of gas cutting on the side of the cylinder like that. what is the barrel cylinder gap?

    son of a buck.. this is the wifes profile,sorry this is johnlives4christ
     
  14. mesinge2

    mesinge2 Active Member

    609
    Dec 4, 2009
    Central Florida
    I don't know. I don't have calipers or a feeler gauge to measure. I might stop in to my gunsmith tomorrow and have him measure it.
     
  15. johnlives4christ

    johnlives4christ Former Guest

    Apr 28, 2008
    Kentucky
    a match book cover is just about .010. if a matchbook cover will fit, then the gap is too large
     
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