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Thread: Fitting a bolt to a barrel

  1. #41
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    Quote Originally Posted by Heavy Metal View Post
    Tight Tolerances are always good. You are confusing Clearance with Tolerance.
    Exactly. HS on our rifles will pass M4/M16 acceptance inspection. It is not tighter than the designed clearance, but our tighter tolerance keeps HS within a smaller window than the M4/M16.

  2. #42
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    Quote Originally Posted by Todd.K View Post
    Exactly. HS on our rifles will pass M4/M16 acceptance inspection. It is not tighter than the designed clearance, but our tighter tolerance keeps HS within a smaller window than the M4/M16.
    Excellent wording Todd (much better than I could do).


    C4

  3. #43
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    Quote Originally Posted by Todd.K View Post
    Exactly. HS on our rifles will pass M4/M16 acceptance inspection. It is not tighter than the designed clearance, but our tighter tolerance keeps HS within a smaller window than the M4/M16.
    Is this determined with a tighter No-Go tolerance?

  4. #44
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    Sorry to thread jack a bit, but this is kind of related and I don't know that it's worth a whole thread since there is already very similar (but not quite what I'm looking for) information here. I have a factory N4 and went to buy a spare Noveske bolt for it last night but I noticed that the site said to specify head spacing in the comments. How would I do that? Would I actually have to get a field gauge and measure it? Or would I specify round count (~2500 IIRC)? Something different or not worry about it?

  5. #45
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    You would specify if you were buying a barrel and a bolt together. There's really no way to match a barrel and bolt unless you have both parts in front of you. It isn't done with field/go/no-go gauges.

  6. #46
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    Quote Originally Posted by bp7178 View Post
    You would specify if you were buying a barrel and a bolt together. There's really no way to match a barrel and bolt unless you have both parts in front of you. It isn't done with field/go/no-go gauges.
    That's what I thought from reading here, I just got confused on that part. Thanks.

  7. #47
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    Quote Originally Posted by Wake27 View Post
    Sorry to thread jack a bit, but this is kind of related and I don't know that it's worth a whole thread since there is already very similar (but not quite what I'm looking for) information here. I have a factory N4 and went to buy a spare Noveske bolt for it last night but I noticed that the site said to specify head spacing in the comments. How would I do that? Would I actually have to get a field gauge and measure it? Or would I specify round count (~2500 IIRC)? Something different or not worry about it?
    Call Noveske and ask them
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  8. #48
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    Quote Originally Posted by MistWolf View Post
    Call Noveske and ask them
    They were only in stock between 2-4 am I think, but wouldn't be a bad idea anyways.

  9. #49
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    Quote Originally Posted by C4IGrant View Post
    Noveske came up with a standard fitting for bolt to barrel. We purchased gauges from them and follow their protocol when fitting.


    To date, every single gun that I have fitted a bolt to a barrel has shot UNDER 1" groups.

    Do I think it makes a HUGE difference? No I don't. It is one of the steps that I follow religiously though when building a precision rig and to date, have never been let down.



    C4
    might be a stupid question here, but how would this work? say you have someone that has a colt 6920 with an old barrel and wants to change to a noveske mid length barrel. do you just install the noveske barrel and keep checking bolts until you find the one you like?

    for example, if the milspec is 1 - 5 for but noveske chooses 4-5 you just put in a bolt, if it passes the go/no-go test with a size 3 you check another one. it would still pass mil-spec but wouldnt be your "precision spec"?

    but for a spare, i need a bolt now, you can just buy any quality mil-spec bolt from like bcm or colt and it will be fine but your groups "may" open up a little?

    is that correct?

  10. #50
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    Quote Originally Posted by wsaraceni View Post
    might be a stupid question here, but how would this work? say you have someone that has a colt 6920 with an old barrel and wants to change to a noveske mid length barrel. do you just install the noveske barrel and keep checking bolts until you find the one you like?
    Yes.



    C4

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