788/700 barrel threads.

Discussion in 'Gunsmithing' started by JJMoody, Aug 2, 2018.

  1. JJMoody

    JJMoody Well-Known Member

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    Any experience/ knowledge on the thread difference between the two? I bought a barrel that was chambered for a blueprinted 700 I've been wanting to mess with a 788 I have and was curious as to possibly spinning it on the 788 action. It's doubtful but hey...
     
  2. Farmerboy78

    Farmerboy78 Well-Known Member

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    I believe the 788 is the same as a small shank savage.
     
  3. MNbogboy

    MNbogboy Well-Known Member

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    700 is 1.062x16 tpi
    788 is 1x20 tpi
    Savage small shank 1.055 (1 1/16) x 20
    But you should be able to turn & rethread the 700 barrel to fit the 788. I believe the Counter bore on the breech gets remodeled also.
     
  4. JJMoody

    JJMoody Well-Known Member

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    Would that mean rechambering?
     
  5. MNbogboy

    MNbogboy Well-Known Member

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    Careful removal of the counter bore leaves the case rim protruding as a Savage. I am not familiar with that dimension on the 788. Someone else could chime in.
    That being said after cutting and threading a new tenon, head spacing would be difficult, if not impossible without rechambering.
    My guess is if your barrel is newer and high quality it might be worth the effort. Shouldn't cost much more than a set back/re-chamber.
    There should be some more experienced pros on here to weigh in.
    Randy
     
  6. Bravo 4

    Bravo 4 Well-Known Member

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    You may have been thinking about the 783, different rifle than the 788.
     
  7. J E Custom

    J E Custom Well-Known Member

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    This is correct.
    The 788 also has a longer barrel thread (Almost 2") so the thread would have to be extended and the breach face should be cut square. The barrel threads on the 788 are quite a bit different than the 700 so they would need redoing and the chamber should be re head spaced or cut.

    This should not require much more than a good clean up Like a set back.

    There is also a relief cut in the 788 barrel threads for the action screw. but it is not necessary if the front action screw is cut to the correct length.

    The recoil lug can be replaced with a 700 lug , if a boss is placed on the barrel shank to land it on and the rest of the shank is threaded with the smaller dia. thread.

    It sounds difficult but it is not.

    J E CUSTOM
     
  8. sable tireur

    sable tireur Well-Known Member

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  9. JJMoody

    JJMoody Well-Known Member

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    Well, kinda feels like the ol 788's gonna stay a 22-250 for a while... seems like it can be done, but maybe not very well.
     
  10. J E Custom

    J E Custom Well-Known Member

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    The 788 is a great action and very easy to change as long as you stay with the cartridges that It was designed for. If you change to one of the other cartridges all you have to do is change the bore diameter to the proper bore size and purchase the proper Magazine for the cartridge

    The machine work is easy, but the requirements are different than the 700.

    What cartridge were you thinking about ?

    J E CUSTOM
     
  11. JJMoody

    JJMoody Well-Known Member

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    Well, I kinda got restless/bored/"what the hell-ed, and bought a 6.5-47 Lapua barrel off the classifieds. Been looking at the TL industries actions, but thought I might mess with the 788 a bit.
     
    Last edited: Aug 3, 2018
  12. JJMoody

    JJMoody Well-Known Member

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    Didn't put much time into thinking about it
     
  13. J E Custom

    J E Custom Well-Known Member

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    The 788 uses a single stack magazine and I'm not sure that one of the factory mags can be made to fit and feed the 6.5x47.

    I just finished three 260 Remington AI's (6.5x308) using the 788 action and they worked great using the 308 mag.

    J E CUSTOM
     
    Last edited: Aug 4, 2018