bolt face lapping

Discussion in 'Gunsmithing' started by gear head, Mar 17, 2012.

  1. gear head

    gear head Well-Known Member

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    Does lapping in a new action really help that much or should i just try the action out first and see how accurate it is. Don,t want the extra cost of the bolt face tool and have to take the gun a part a extra time if i don,t have to. lapping will be done to the bolt face. Gun will be used mostly for target shooting.
     
  2. shortgrass

    shortgrass Well-Known Member

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    If you're talking about a "factory built, complete rifle",,,, leave it alone. All the truing procedures to an action generally take place when fitting a custom barrel. You asked your question in a very general way, without specifics. I gave a 'general' answer.
     

  3. gear head

    gear head Well-Known Member

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    The rifle has a "26 hand lapped match target barrel, aftermarket recoil lug and trigger, tactical stock and will be used for target shooting. That's why i was asking about the bolt face lapping to improve the accuracy.gun)
     
  4. shortgrass

    shortgrass Well-Known Member

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    Should have been done before the barrel was installed, along with other action "truing". Bolt faces are generally cut with a single point tool instead of lapped. Lapping would take forever. Sounds like another one of those "have to have" tools that have no use. Any work done to the bolt face can/will effect head space. That's why it is done before barrel installation.
     
  5. FEENIX

    FEENIX Well-Known Member

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    I agree with shortgrass. Unless you did it yourself, I'm surprise the gunsmith did not recommended that, unless you declined it.
     
  6. gear head

    gear head Well-Known Member

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    Barrel is not installed yet, i am doing the barrel install myself so noting has been assemble yet so i just want people's feed back on the build so can get all the best info from you experts. Just don't want to wasted time doing things twice. I have go and no gauges when i install the barrel. Thanks
     
  7. shortgrass

    shortgrass Well-Known Member

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    If all you're gonna' do is "lap" the bolt face without doing the work on a lathe all you will be doing is polishing it, you won't know for sure that it is a true 90 deg. to the center line. Just 'truing" the bolt face on any 'factory' action probably won't show you a speck of increase in accuracy that you can make use of. A "target" action, like a Kelby, Bat, Hall or Stiller Cobra won't need the bolt face "trued,, because they already are! You're trying to pick out one little thing that will be the magic ticket to accuracy. The one thing I have found over the years is to specify a "tight neck" on the chambering reamer. SAMMI specs are very generous. As you are going to install the barrel yourself, I suspect we are taking about a pre threaded/chambered/crowned barrel for a Savage, and if that's the case, save your money, you won't see a measurable increase in accuracy.
     
  8. gear head

    gear head Well-Known Member

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    Thanks for the great info,will be finishing the build soon.
     
  9. TTF

    TTF New Member

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    Mar 23, 2012
    Lapping depends completely on the skill of the person doing it. I do not recommend any lapping outside of lightly lapping threads after single point threading the barrel unless you are fitting slides on a pistol.

    For an accurate build it needs to be done on a lathe.