Seating Depth Solution for Magazine-fed Rifles

Discussion in 'Reloading' started by frankinaustin, May 15, 2018.


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  1. frankinaustin

    frankinaustin Well-Known Member

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    Oct 2, 2013
    See pics below... My rifle is a Cooper Model 54 in 7mm-08. The magazine is made from thick 15 ga stainless. My smith (Black Jack Gunsmiths, Austin Texas) used an end mill to take out some metal to accommodate up to an ext 1/10" of COAL. He used a file to clean up the edges, etc. It's a nice enhancement and now my long rounds feed as expected. (the dummy round at the bottom of the stack was seated even longer to exaggerate the condition for illustrative purposes...)

    mag 2.jpg

    mag 1.jpg
     
    therifleman556, slas and RockyMtnMT like this.
  2. Rich Coyle

    Rich Coyle Well-Known Member

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    Aug 14, 2013
    Interesting.
     
  3. ksfarmer

    ksfarmer Member

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    Feb 25, 2018
    Overall gain was + .060 to OAL. ?
     
  4. frankinaustin

    frankinaustin Well-Known Member

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    .1" gain from the machining.
     
  5. therifleman556

    therifleman556 Well-Known Member

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    Jul 9, 2017
    Very neat trick, and one I assume could easily be adapted to other designs.