Large Shank vs. Small Shank Savage actions

Discussion in 'Gunsmithing' started by 762frmafr, Jul 12, 2012.

  1. 762frmafr

    762frmafr Well-Known Member

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    What say you oh guru's of the barrel nut? Is it all gimmick like I've been hearing? Or is there some validity to a Large Shank action with high pressure rounds? Lets hear it. I will be back to stir the pot every so often. Mind you this is for my education and curiosity only.
     
  2. 762frmafr

    762frmafr Well-Known Member

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    What does everyone think Savage's reasoning is behind making the new 338LM actions as well as the Target actions and WSM actions Large Shank?
     

  3. J E Custom

    J E Custom Well-Known Member

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    I don't consider myself a Guru, but I do have an opinion based on experiences.

    The barrel nut is not a gimmick, It is a means of Quick assembly at the factory.

    Most factories have a way of headspacing fast and this is just one method.

    It is also a good way to head space consistantly if done by an expert.

    The trouble in my mind with it is that they are not always assembled by an expert and the
    additional threads add to the possibility of poor alignment of all of the action and barrel
    parts.

    I prefer to shoulder the barrel and make it up without the nut. (I think it looks better and
    definitely more consistant rifle to rifle.

    Note : It is not designed to be able to switch barrels indiscriminately. The factory is even starting
    to make the barrel nuts with no wrench flats to prevent this.

    On the shank issue - The larger the shank the better the support for large powerful cartriges. The
    chamber allways expands upon firing. The amount depends on the shank size.

    This expansion is what causes the brass extraction problems when high pressure loads
    are used because the chamber returns to its original size and the brass has yielded and does not.

    A larger shank will minimize this in powerful cartriges. "Size does matter".

    J E CUSTOM
     
  4. 762frmafr

    762frmafr Well-Known Member

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    My question was not about the barrel nut. But that is a good theory about large shank vs. small shank. Could it also be because a large shank supports a heavier barrel more accurately? Thank you for your input.
     
  5. J E Custom

    J E Custom Well-Known Member

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    Sorry, but your first post ask about the barrel nut and what we thought about it.

    The barrel shank size is not a theory it is designed to a size/thickness to support the chamber
    diameter minimizing chamber expansion during firing. The bigger more powerful the round
    the bigger the shank and the action, and the bolt.

    The larger shank does help support the heaver barrel,But if you want a lighter barrel you should
    still go with lager shanks and actions if a large cartrige is to be used.

    J E CUSTOM