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Mis-aligned Scope Mount Holes

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Old 02-26-2010, 10:22 AM
Junior Member
Join Date: Nov 2007
Location: Belgrade, MT
Posts: 26
Mis-aligned Scope Mount Holes

I shoot a custom 280AI built from a Rem. 700 action. I shot this gun for 2 years with no problems at all. It shoots great, sub .5 MOA if I do my job. About a year ago I sent my Swaro scope in for service, when it came back I had my smith re-mount it for me..took it to the range and ran out of horizontal adjustment in order to hit center. Turns out the scope mount holes are mis-aligned slightly. The more I have read on this, it doesn't seem to all un-common in the 700 factory actions. Had I known at the time I wouldn't have built on that action though.

To get me through this hunting season I used the Leupold windage adjustable mounts and had no problems. Just recently I ordered a new Leupold 30mm scope for the rifle. I have heard some not-so-good reports on the windage adjustable bases, and want to set up this new scope the best way possible given the mis-aligned holes. I know some people really like them though.

I have read some good things on the Burris Signature rings that are windage adjustable. What bases would you recommend if I used the Burris rings? Is Burris the best option?? How do they work exactly? Or should I just stick with the Leupold bases?
Any feedback is greatly appreciated.
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Old 02-26-2010, 12:39 PM
Silver Member
Join Date: Nov 2009
Location: Timber Lake, South Dakota
Posts: 306
Re: Mis-aligned Scope Mount Holes

Drake4, I might have missed something, was the Swaro zeroed before sending it in to have the work? What was wrong with the scope? If it is the reciever, I'm wondering why this wasn't a problem before the work was done?

Indian Country Lawman
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Old 02-26-2010, 02:07 PM
Junior Member
Join Date: Nov 2007
Location: Belgrade, MT
Posts: 26
Re: Mis-aligned Scope Mount Holes

The swaro shot great before I sent it off. I have a feeling I must have been right on the edge of my windage allowance before sending it off. When I got the scope back and re-mounted I was about 1 inch from center at 200 yards. That's when I had the smith check my mount holes.
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Old 02-26-2010, 05:00 PM
Platinum Member
Join Date: Dec 2001
Location: Long Island, New York
Posts: 2,246
Re: Mis-aligned Scope Mount Holes

There's nothing wrong with the windage adjustable rings/base that you have. However, if you wanted a double dovetail set then the Burris Signature rings would resolve your problem. You can also use a Weaver or Picatinny base with the matching set of Signature Rings.

Check the Burris web site and look at the off-set inserts. When properly installed they can correct the problem you're having with the mounting holes being off.
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Old 02-26-2010, 06:50 PM
Junior Member
Join Date: Dec 2006
Location: SW Pennsylvania
Posts: 11
Re: Mis-aligned Scope Mount Holes

Check with Darrel Holland he has a Picatinny rail that is adjustable for windage.
His web site is Holland's Gunsmithing & Shooters Supply
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Old 02-26-2010, 11:08 PM
Silver Member
Join Date: Jan 2008
Location: Dixie, WV
Posts: 148
Re: Mis-aligned Scope Mount Holes

You may be able to have your smith setup your reciver and redrill the holes and re-tap them. It would also matter how much off center the holes were. If they are off to much it may not be fesiable. Just make sure he goes with a big enough thread to remove all of the old threads and have a clean hole to tap.
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Old 05-28-2010, 12:12 PM
Junior Member
Join Date: Feb 2008
Location: Cedar City, Utah
Posts: 21
Re: Mis-aligned Scope Mount Holes

Drake, I feel your pain. I bought a 700 SPS in .243 a year ago and just got around to scoping it a couple weeks ago.
I am using a EGW 20 MOA one piece base and an IOR scope which I pulled from my AR-10. On the AR-10 the scope required little to no windage adjustment. On this 700 I had to turn in ~30 MOA to get centered during bore sighting. I pulled the scope off and mounted my alignment tool and checked and it is definently not aligning with the bore. SO I remounted the base and tried to tweak it as far as possible which only bought me a few MOA.
I talked to one of Rem's service shops and they told me that it is common for there to be some misalignment and that mine may be out of tolerence.
I am going home tonight and check it again to make sure before I send it back.

I am pretty pissed since I bought this gun as a base to build off of. I knew I would be replacing a things over time as I build it up, but right off the bat I have found the stock is junk (expected) and a real weak point, trigger is garbage and needs to be replaced (not expected), barrel is better than expected, but now the reciever appears to have misaligned base holes. I am now wondering why I bought this rifle as there is nothing usable here, maybe the bolt?
I should have just started with a Bat action as I had originally planned.
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