M77VT torque specs

Discussion in 'Rifles, Bullets, Barrels & Ballistics' started by 7stw, Jan 1, 2013.

  1. 7stw

    7stw Well-Known Member

    Messages:
    1,323
    Joined:
    Jan 21, 2010
    I have a KM77 MKII VT, and was wondering what the recommended torque is for the action screws. It has a laminated stock. I know that the middle screw should be just snug, but am a little unsure about the main fasteners. Any other thing " quirky" that anybody may know of would be appreciated.
    Happy New Year.
     
  2. chronic

    chronic Well-Known Member

    Messages:
    105
    Joined:
    Apr 9, 2010
    I have one and sent it back to Ruger for being "inaccurate". Well they said the action screws were loose. I had them torqued at about 55 inch lbs. The guy at Ruger said 95!! Shoots sub .5" groups now.

    chronic
     

  3. 7stw

    7stw Well-Known Member

    Messages:
    1,323
    Joined:
    Jan 21, 2010
    Wow, that seems high, but if that is what the factory says! I know that this is laminated wood too!
     
  4. chronic

    chronic Well-Known Member

    Messages:
    105
    Joined:
    Apr 9, 2010
    I agree it was high to me. I had to buy a new torque wrench.

    chronic
     
  5. Rem700

    Rem700 Well-Known Member

    Messages:
    110
    Joined:
    Jan 12, 2011
    I bought a Fat Wrench awhile ago. It stops at 65lbs. But I torque my wood stocks rifles at 45lbs.
     
  6. chronic

    chronic Well-Known Member

    Messages:
    105
    Joined:
    Apr 9, 2010
    I hope that is inch lbs!

    chronic
     
  7. 7stw

    7stw Well-Known Member

    Messages:
    1,323
    Joined:
    Jan 21, 2010
    I have one of those, and use it on every dis assembly. What a awesome little device. It has all the bits commonly used in our hardware, including hardware for scopes, and bases. Imay have to use my in/ lb torque wrench from work if it is 95.
     
  8. AZShooter

    AZShooter Well-Known Member

    Messages:
    2,071
    Joined:
    Dec 12, 2005
    I cannot imagine 95 in/lb. Must be a mistake. I would ask another person at Ruger..... I'd be willing to bet you'd have a heck of a time keeping a standard flat bit in the slot with that kind of torque. I have difficulty keeping it in a Mark X with 45 in/lb!

    A friend that shoots 1000 BR starts out with 35 in/lb rear and 40 in/lb front and tweaks some from there. He can actually fine tune the groups by changing the torque. It would seem every BR rifle has its favorite torque.

    We both use in/lb torque wrenches on our hunting rifles. If it is a laminate or synthetic that is bedded we run as high as 55 in/lb front and rear. Some respond well to lower settings. If a rifle is pillar bedded I doubt you'd see any differences with higher (than 55) torque settings.
     
  9. 7stw

    7stw Well-Known Member

    Messages:
    1,323
    Joined:
    Jan 21, 2010
    AZ, I have to agree, that dos seem to be high. That is nearly 10 ft/ lbs, on a slot head, like you said. If it were Allen, or Torx, no problem.
    And I know what you mean about being able to "tune " it changing the torque. I have gotten to be anal about returning to the correct torque, after dis assembly. I also check it at the range, and when I go hunting.
    I may have to do some additional checking, and that is NOT to say that I don't believe what I was told earlier in this thread. Thanks for the feedback!
    P/S, I have it set now at 45 in/ lbs., and the center screw just snug.