378 or 460 Weatherby in a Remington 700?

Discussion in 'Gunsmithing' started by HarryCallahan, Aug 5, 2008.

  1. HarryCallahan

    HarryCallahan Well-Known Member

    Feb 22, 2008
    Has anyone built a .378 or .460 Weatherby on the Remington 700 action? The bolt face and body of the case (sans belt) are smaller than the .338 Lapua so it seems do-able.

    Looking to mess around with these to get rid of the fascination before I get too old to shoot them. You know how it goes, got a box of ammo now I need something to shoot it in!
  2. J E Custom

    J E Custom Well-Known Member

    Jul 29, 2004
    Harry C

    In order to open the bolt face enough to fit ether the Lapua or
    the 378 case you will have to remove .050" from the bolt face
    leaving a very thin ring and you would have to install a sako or
    M16 extractor.

    I would recomend the RUM (no bolt work) and about the same
    power as the lapua if you want to use the Remingtion action.

    A weatherby MK 5 or a custom action if your going to the large rim
    Dia. cases like the 378,416 and 460 weatherby because of bolt Dia
    and the extractors can be changed very easy.

    The Remingtion is strong enough but with the extra cost to machine
    and change extractors Most Gun Smiths will recomend a lager action
    for this class of cartriges.

    Last edited: Aug 21, 2008