Manners MCS-DBM Mini Chassis problem

Discussion in 'Rifles, Bullets, Barrels & Ballistics' started by bbaley, Mar 5, 2014.

  1. bbaley

    bbaley Active Member

    Messages:
    38
    Joined:
    Aug 6, 2013
    Hi all,
    I just received my new build, with an MCS-DBM Mini Chassis (in a T4A stock) and am having a problem....

    The LAST round from the magazine will jamb when closing the bolt SLOW.
    The first four or three or two chamber fine. even slowly.

    95% of the time, the last round will chamber fine when closing bolt fast on last round.

    I have never seen this before. (but, I am no expert either) on 4 other guns I have had with a magazine.

    I tested, by:
    1) loading 5 rounds (in various order) at least 5 times. same result
    2) loading one, of 5 rounds singly in magazine, same result - 50 total cycles.

    I changed order to make sure it wasn't specific cartridges causing the issue.

    The test cartridges measure same as Federal Gold match in my Hornaday OAL gauge.

    Every time, the first 1-4 chamber fine. slow or fast.

    anyway, I have contacted the gunsmith who built it, he is looking into it but unsure,
    so I thought I'd check on your experience with this chassis/magazine for similar issues.

    Last thought - it's only had 10 rounds through it, plus these test cycles... maybe it needs some "wear" ?

    appreciate any ideas/info/experience !

    This is a .308
     
  2. Elk Hunter 338

    Elk Hunter 338 Well-Known Member

    Messages:
    571
    Joined:
    Feb 19, 2010
    Question... is it an accurte mag center feed or a true double stack like an AW 10 round? and what are specs on this build such as action ETC? just to get a better idea
     

  3. bbaley

    bbaley Active Member

    Messages:
    38
    Joined:
    Aug 6, 2013

    It is a Rem 700 short bolt action. Stock bolt. trued/timed, etc.


    The magazine is Accuracy International 5 round style,
    as can be seen here: "Manners MCS-DBM mini chassis"
    MCS BDL and DBM Mini Chassis « Manners Composite Stocks
     
  4. Elk Hunter 338

    Elk Hunter 338 Well-Known Member

    Messages:
    571
    Joined:
    Feb 19, 2010
    so i take it the rounds are feeding out of the center? is the last round getting jammed into the back of the barrel tenon? or??