300 WSM Through LA Magazine ??

Discussion in 'Big Stuff--7mm, 30 Cal, .338+' started by R.Morehouse, Aug 2, 2019.

  1. R.Morehouse

    R.Morehouse Gold $$ Contributor

    Joined:
    Nov 24, 2012
    Messages:
    1,452
    Been asking around and doing searches and have gotten some help but need your ( the masses ) input. I have a 300wsm built on a Rem 700 LA. It sits in an A-3 right now with Obermeyer Canoe style BM. I ordered an MPA Chassis and would like to know what to get or modify to be able to feed the 300wsm rounds through a detachable mag..........Thanks for your input.

    Regards
    Rick
     
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  2. Ares

    Ares

    Joined:
    Oct 1, 2013
    Messages:
    105
    AICS 300 win mag, or 338 CIP or non CIP magazines will all work with the 300 WSM, the Feed lips will generally need a little modification though.
    The MPA chassis takes AICS style mags by default.

    Also accurate and Alpha makes mags that will work. Most made specifically for the 300 WSM is SA mags though.
     
    Last edited: Aug 5, 2019
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  3. slugger3

    slugger3

    Joined:
    Feb 8, 2015
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    91
    What is your COAL?
    Bullet?
    Thanks
     
  4. Trevor60

    Trevor60

    Joined:
    May 24, 2010
    Messages:
    196
    Good Morning

    I have a 300wsm in a Kelbly atlas LA action with a CADEX chassis. I have 338 CIP mag 3.850 more length then you will possibly need, but i plan to shoot 215 and want as much boiler room open for powder.
    the 300win mag isn't my first choice for mag as the case is too narrow

    300 win mag body dia .513
    300 wsm body dia .555
    338 Lapua body dia .587

    You have to tweak the lips on the 338 mags but they will work

    Trevor
     
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