out of windage

Discussion in 'Gunsmithing' started by bryguy, Jul 25, 2012.

  1. bryguy

    bryguy Active Member

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    Well, started to put together my long range rig last night. Win Model 70 coyote in 7mm wsm. I have an EGW 20 MOA base on it right now, and tried a set of Burris XTR tactical rings and a Zeiss 6.5-20x50 conquest . Elevation was fine, but windage ran out. I tried several different rings I had, and even made some brass shims for the rings to try to gain the windage back, but still could not get it where I want it. So, my question is what do I do now? I ordered a set of burris signature zee rings and a insert kit this morning. I had the crow recut on this gun, is it possible the crown was cut canted(I am using a Leupold zero point boresighter, the one that magnetically fits to the muzzle) and that is giving me a false windage target? Or are the holes for the bases tapped off center? I 'checked' them the best I could using a 4 foot ruler, and I saw nothing out of the ordinary, but that would have not shown small errors. Any suggestions you guys might have?
     
  2. Broz

    Broz Well-Known Member

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    Many here sware by the EGW base. I am one that does not, from my past experiences with them. The first thing I would do is change the base. Also, the mounting holes in the receiver could be off too, but if you have had other scopes on the rifle that shot ok, then that kinda eliminates that.

    Jeff
     

  3. bryguy

    bryguy Active Member

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    Broz, first time mouting a scope on this rifle for me. I just picked it up last week, so I am unsure about the mounting holes in the receiver. I will see what my local guy has base wise, may just go with a standard weaver base since I have the Burris signatures headed my way now.
     
  4. J E Custom

    J E Custom Well-Known Member

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    Try the weaver base and if it is also off you have a problem with the mounting holes on the rifle.

    If this is the case, you can buy the old style base with the windage adjustment. (They were made
    to correct this when the old scopes only had 10 MOA of windage These bases will be fine with no
    more recoil than the WSM has. If the new scope wont correct with the weaver base, other than
    re drilling the reciever the adjustable bases are the only way that will allow full windage
    adjustments.

    The Z rings may have enough adjustment to fix your problem.

    J E CUSTOM
     
  5. bryguy

    bryguy Active Member

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    Thanks for the info...will check it later when I have a chance to run by my local gun shop. How big of a deal is it to have the receiver redrilled and tapped correctly?
     
  6. rscott5028

    rscott5028 Well-Known Member

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    All goo suggestions.

    But, I never trust those boresighter gizmos.

    I would bag up the rifle and remove the bolt.

    Sight thru the bore onto a target 50-100 yds away, and then adjust the turrets.

    -- richard
     
  7. BARTFRNCS

    BARTFRNCS Member

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    I always redrill and tap to 8-40 when I true an action. Yes they are always off some a little some alot. My advice is to have the action redrilled anyway you need to have zero focal plane deviation. Also if you decide to not redrill costs about 150 to 200 bucks when done as a seperate operation, and use a windage ajustable base make sure your not flexing the scope tube. If you do you wont be looking through the center of the focal plane.gun)Bart
     
  8. bryguy

    bryguy Active Member

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    Thanks for the info...will call around locally and see what the local smiths charge to redrill and tap.......I have a drill press and I have ran a mill and lathe before, is this something in the realm of possibility for a some what skilled novice or should I leave it to a pro?
     
  9. BARTFRNCS

    BARTFRNCS Member

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    First you need a way to coaxialy indcate in your action on a mill a drillpress likly has to much runout. Next line up the centerlineof the bolt raceway with the top dead center of the action it helps to have a DRO on your mill. Next take a endmill centercuting if posiable and cut the holes in your actions scope base patern. Tap to 8-40 threads. 150 bucks is cheap considering your probly going to have to remove the barrel. Thats why I do it while I'm blue printing the action.gun)Bart
     
  10. bryguy

    bryguy Active Member

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    If it is that involved, sounds like 150 is a bargain.......and I would be better letting my smith do it......
     
  11. BARTFRNCS

    BARTFRNCS Member

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    Cheap for a couple of jigs and about 30 min of machine time.gun)Bart
     
  12. bryguy

    bryguy Active Member

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    Well, it is as I figured...the holes in the receiver are drilled off center.........Changed the base, and it still is way off. I did manage a temporary fix, talked to my local gun guy and he gave me a set of the millet angle loc rings, they have windage adjustment built into the ring itself. Will roll with that till I get some time to get the bases worked out and drilled properly.........I do not really like the way those rings look, the Signature Zee's should be here tommorow so I may just roll with them and call it good till after hunting season and then do a rebuild on this rifle......
     
  13. J E Custom

    J E Custom Well-Known Member

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    Sounds Like you have a handle on your problem and have an idea how to deal with it.

    Milling the new holes is the correct way to fix the alignment because drills will follow the existing
    holes and wont correct the problem.

    It is also the most expensive way to fix it ,But you can use any base and rings that you want
    (A real plus).

    This was very common with all factory rifles in the past but not so much any more.

    J E CUSTOM
     
  14. bryguy

    bryguy Active Member

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    Yeah, this gun is a New Haven M70, and best I can tell the last time Win made this configuration was in 05, and that was about the time things started going down hill there at the New Haven Plant. I will just roll with it for a few months, and depending on how it shoots, may rebarrel and have everything trued up and blueprinted.