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300 Win Mag.

Discussion in 'Firearms Research' started by Jonathon Bacon, Jul 27, 2020.

  1. Jonathon Bacon

    Jonathon Bacon Member

    Joined:
    Jul 27, 2020
    Messages:
    1
    I have a mossberg patriot chambered in 300 win mag. I put around 25 rounds through it of Hornady 150 grain and it functioned flawlessly. I picked up some Winchester super x 180 grain and when I engage the bolt the 180 grain cause the bolt to become stiff and not want to close. Is this a difference in bullet weight or rifle issue?
     
  2. climbnjump

    climbnjump Member

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    Aug 8, 2008
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    Location:
    Upper Midwest
    Could be out of spec ammo. I had some Winchester 7mm RM mag ammo that was out of spec.

    I don't know in your situation whether it is rifle or ammo. But it could be the loads are loaded long and bullets are engaging the rifling. Or it could be a short throat in the rifle. It could be that the case is larger than spec. Or...

    But no, the bolt should not be stiff and hard to close with good ammo. You probably don't want to fire those rounds until you figure it out. If you don't own the tools to figure it out, perhaps find a gunsmith who can solve the mystery for you.
     
    bearleft likes this.
  3. bearleft

    bearleft Member

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    Nov 25, 2015
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    Location:
    KY
    Maybe a gunked-up chamber?? I clean mine with a .50 cal. brush.
     
  4. Dr.Rob

    Dr.Rob Moderator Staff Member

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    Dec 23, 2002
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    Location:
    Centennial, CO
    As said above, bullets could be engaging the rifling as you close the bolt.

    Is there a max OAL for that firearm?
     
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