Gunsmithing Remington scope mount holes off aligned

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base

Sergeant
Full Member
Minuteman
Mar 6, 2009
134
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San Francisco, Ca
#1
so in May of this year i bought my first Remington, an sps-v in 308. i had a Vortex Viper 6.5-20x50, EGW 20 MOA base and Burris XTR ring atop it. when i got my rifle zeroed @ 100 yards the scope would only give me 5.5 MOA adjustment right but 49.25 MOA to the left. i wanted to figure out what was wrong by process of elimination.

i sent the scope back to Vortex and got one that is good, still same problem. i then went to replace the rings and bases with a set of Seekins Precision 20 MOA base and medium height 30mm rings. the Seekins base did improve on my vertical adjustments over the EGW. but again same windage adjustment problem. i contacted Remington and they told me to send the rifle to J&G Gunsmithing in Granite Bay, CA to have it looked at. thats who they outsourced to. J&G said the mount holes are fine and it must be some other piece or a combination of equipment that was off. they said i needed some windage adjustable rings to fix the problem. after my process of elimination i still beleive its the mounting ring holes drilled by Remington. below is a link to a previous topic about windage adjustable rings that ended up turning into a Gunsmithing topic so i wanted to connect it to a topic in the correct forum. any help thanks.

http://www.snipershide.com/forum/ubbthreads.php?ubb=showflat&Number=2613991&gonew=1#UNREAD
 
#2
Re: Remington scope mount holes off aligned

Are you making sure the turrets are centered before you zero? For example if you have 80 MOA of windage do you set the cap at 40 before you zero?

Rich
 
#3
Re: Remington scope mount holes off aligned

Its very common for the holes to be off for windage.
Im surprised Remington said to send it to a smith. And that they said its fine.

A gunsmith can open the holes to 8-40 aligned with the raceway. However, without truing the action this means nothing.

The holes have to be in-line with the receiver face. This can only easily be done after the action is completely trued.

Without truing the action, youd have to indicate the face in, which wont be even, then mill out the holes. That wont be easy.
 
#4
Re: Remington scope mount holes off aligned

If the scope is straight with the receiver then maybe the barrel is on slightly crooked. Is the barrel straight in the channel cut in the stock? Do the joints between the recoil lug and barrel, and lug to receiver look tight? Is the crown dinged? That sounds like it's off far enough that something should be visibly crooked. If you look closely at a 20moa base you can see an angle, so that's what you would be looking for (but sideways).

Short of having a gunsmith sort it out, you might be able to use something like those burris rings with elevation inserts turned 90 deg to adjust windage.
 
#5
Re: Remington scope mount holes off aligned

I've got a Remmie that the scope base holes are in line with the centerline but are drilled at the 11:30 / 4:30 axis, as is the trigger groove/pin holes when viewed from the bolt end. Everything works but the scope sits slightly off and the trigger leans to the opposite side of the bow. I had assumed the lug was installed incorrectly until I pulled it out of the wood and took a close look. I also had to re solder the bolt on after about 150 rounds. I think it must have come off the line on a friday just before quittin time....
 
#6
Re: Remington scope mount holes off aligned

as of right now J&G has my rifle and will be asking them to send it back to me tomorrow so how ever long that takes. i have also heard of the whole crooked barrel problem. i will inquire about that tomorrow when i contact J&G. the crooked barrel seems like a bigger problem to fix than the mounting holes. have been thinking of using some windage adjustable rings but i really like my Seekins rings and want to use them.
 
#7
Re: Remington scope mount holes off aligned

There's no definite, easy fix.

The action has to be trued, THEN the holes opened up correctly.


Opening them up without truing the action is pointless. What will he align them with??

The holes must be square with the receiver face. That is what ensures its pointing where the barrel is(minus bore runout).

Either get windage rings and deal with it, or have the action trued then have the holes opened up and corrected.
 
#8
Re: Remington scope mount holes off aligned

We see this problem all the time in our store. I've seen Remington 700s come out of the custom shop with this problem. To fix sometimes we use the Burris Weaver style rings with the offset inserts, sometimes we use the Leupold Standard mounts. You can also consider a lower magnification range scope that has a larger range of adjustment.
 
#10
Re: Remington scope mount holes off aligned

This problem normally has an easy fix.

Let me explain the most likley problem your having.

Remington recievers are polished before assembly, during this process the rear reciever bridge typically shows a slant off to the right and the rear as you stand behind the gun.

When 2 pc bases are attached, the rear base cants to the right thus the ring cants to the right . with a 1 pc rail, the aluminum made , will usually twist causing the same effect.

This causes your scope to point to the left, so with the windage turret zeroed out your bullets would impact right.

This is why all rails should get epoxy bedded stress free to remington recievers.

Now like has been said before, an extreame bore curvature, or a reciever face/thread tennon that is grossly out could also be the culprit, but more commonly it is the slope on the rear reciver bridge and the rear ring cant that causes the problem.



I have built over 100 rifles on a remy reciever and have never had the hole location be the issue, granted all these actions get blueprinted so I eliminate the face/thread, and bore curvature issues. I would take a close look at how the rail fits the reciever. One little test you can do is to set the rail on the gun and instal and tighten ONLY the rear most scope base screw. If the front of the rail lifts off of the reciever you can bet you need your rail bedded "stress free."
 
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#12
Re: Remington scope mount holes off aligned

Put the barreled action in the lathe. Indicate the action so it is running true. Put an indicator on the OD of the barrel near the muzzle. You will probably see why you only have a bit of windage available in one direction. Have your smith set back the barrel and time it to the 12 o'clock position. You will probably get back your windage. We have an M700 on the team with this issue. Fantastic accuracy, but the barrel is curved like a banana.

If I had to bet, I would put my money on barrel timing. Flame away.
 
#15
Re: Remington scope mount holes off aligned

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Jim See</div><div class="ubbcode-body">
Remington recievers are polished before assembly, during this process the rear reciever bridge typically shows a slant off to the right and the rear as you stand behind the gun.
</div></div>

Why rear and right? The way the employees sand it?
 
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