Interarms Whitworth/Weatherby FN ??

Discussion in 'Gunsmithing' started by Ray B, Apr 20, 2018.

  1. Ray B

    Ray B AH Fanatic

    Joined:
    Aug 19, 2016
    Messages:
    852
    Video/Photo:
    2
    Likes Received:
    635
    Location:
    WA St, USA
    I have a barrel that was made for a 300 Weatherby DeLuxe FN that I would like to find an action to fit. I see an Interarms Whitworth express 375 H&H being offered and I am wondering if the Mauser style actions were similar in the receiver diameter/shank/threads so that a barrel from one would fit the other.
     

  2. Clodo Ferreira

    Clodo Ferreira AH Veteran

    Joined:
    Mar 3, 2015
    Messages:
    125
    Video/Photo:
    4
    Likes Received:
    110
    Hi Ray,

    The Interarms Withworth and the FN are, other than the finish, the same action. I think the Interarms would be a perfect one to use your barrel.
    Good luck!
     

  3. Areaonereal

    Areaonereal AH Enthusiast

    Joined:
    Dec 3, 2013
    Messages:
    377
    Video/Photo:
    2
    Likes Received:
    247
    Headspace would not be the same in all probability so have it checked by a gunsmith
     

  4. Clodo Ferreira

    Clodo Ferreira AH Veteran

    Joined:
    Mar 3, 2015
    Messages:
    125
    Video/Photo:
    4
    Likes Received:
    110
    Hi A.

    Agree! Although the probabilities are high the headspace of the FN barrel in an Interarms Withworth action would be close enough, EVERY TIME a barrel from a rifle is used in another, even of the same brand and running lot, the headspace should be checked!
     

  5. Dinsdale

    Dinsdale AH Enthusiast

    Joined:
    Jan 1, 2010
    Messages:
    318
    Video/Photo:
    14
    Likes Received:
    269
    Other then the headspace issue; if the WBY has sights, it would seem unlikely they would index.
     

  6. Ray B

    Ray B AH Fanatic

    Joined:
    Aug 19, 2016
    Messages:
    852
    Video/Photo:
    2
    Likes Received:
    635
    Location:
    WA St, USA
    The barrel has no sights. I'm aware that when the gunsmith attaches the barrel, to set the headspace it may involve removing a thread (or not), but my main concern is whether the threads on the barrel would match those on the action. I didn't want to purchase a rifle, intending on having the barrel swapped, only to be told by the gunsmith that they didn't fit.
     

  7. Clodo Ferreira

    Clodo Ferreira AH Veteran

    Joined:
    Mar 3, 2015
    Messages:
    125
    Video/Photo:
    4
    Likes Received:
    110
    Hi Ray,

    The barrel threads WILL match the action's! If the barrel comes from an FN Mauser action and the new one is an Interarms Withworth. That Serbian (or Yugoslavian depending its age) Interarms Mauser action's were/are made with the former FN machinery, belgians sold to that Yogoslavian factory.
     

  8. Von S.

    Von S. AH Veteran

    Joined:
    Aug 26, 2018
    Messages:
    249
    Likes Received:
    188
    1.10 by 12 by .625

    But don't be surprised if it's greater than .625
     

Share This Page

 
  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.
    Dismiss Notice