Scope sighting issue

mehavey said:
Sitting back and just looking at things, the scope appears to be pointing down.

Looking closer, the rear ring is a full dime's width off the rear of the receiver,
while front ring is in full contact with the front of the receiver.
Click to expand...

On a Remington 700, the front receiver bridge is higher than the rear bridge. The front of the receiver is completely round whereas the rear of the receiver is contoured differently. So the rear ring will appear to be higher, but this is normal. You can see from the attached picture of a one piece mount the difference between the front and rear receiver heights on a M700.
 

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We'll need more information to solve this....

What is the manufacturer and part number of the mounts? 0 MOA? 30 MOA? Were they installed new from the package? Or are they used and picked from a spare parts bin? Could they be mismatched and not intended to be used together? Is a one piece mount available to try?

Are the rings, which apparently are used, from the same original set? Or could they be mixed from two different sets? Can you swap the rings front to rear to see if it makes any difference?

Is the scope new or used? Can it be installed on another rifle to check it, or can another scope be installed on this rifle for a check?
 
It is a new scope to upgrade an older old. The older one was Zeroed but lacked features.

It was the rings purchased for that scope so they are a set.
 
If the bases are the same (old) bases, put the old rings back on as well, and mount the (new) scope in them.
That way you've isolated the changes down to one variable
 
LeverGunFan said:
On a Remington 700 the difference is made up in the mounts, not the rings. It's not like the Ruger 77 integral mounts where different rings are used front and rear.
Click to expand...
Of course,silly me. But if it’s possible maybe the mounts are reversed. I’m not familiar with the setup on this rifle, but I am familiar with doing the most obvious thing wrong.
 
Of course,silly me. But if it’s possible maybe the mounts are reversed. I’m not familiar with the setup on this rifle, but I am familiar with doing the most obvious thing wrong.
Click to expand...

Bingo. Look at picture (from previous post). If this is rifle in question, look at the thickness of front and rear bases. Rear base is obviously thicker than the front base. Not familiar w/700's but someone mentioned front ring is smaller dia. than rear, which would call for thicker ring to level scope w/bore.
The higher rear base would cause rifle to shoot high(er).

rem700receiverrings.jpg


Regards,
hps
 
hps1 said:
Bingo. Look at picture (from previous post). If this is rifle in question, look at the thickness of front and rear bases. Rear base is obviously thicker than the front base. Not familiar w/700's but someone mentioned front ring is smaller dia. than rear, which would call for thicker ring to level scope w/bore.
The higher rear base would cause rifle to shoot high(er).

Regards,
hps
Click to expand...

The bases are mounted correctly. The front of the receiver is fully round, where the bolt lugs rotate to lock the bolt. The rear of the receiver is contoured lower than the front. Additionally the screw spacing is different between front and rear so you can't put the bases on wrong.
 
Again, not familiar w/the 700 action, but looking at the picture, the front base is much thinner than the rear and the scope appears to be angled downward in the front. This would make the rifle shoot high. Wonder if the mounts are 20 MOA mounts for LR shooting??

One quick fix would be a set of Burris Signature rings w/set of inserts as described here:

https://www.midwayusa.com/product/1548661544.

Great product, no need to lap rings; choose proper set of inserts and bore sighting is a piece of cake. Inserts hold scope firmly and will not mark the tube.

Regards,
hps
 
Should I do low mount, medium, or high ?
Click to expand...

Height of rings will be dictated by the diameter of your objective bell. Best height will provide a firm, but comfortable cheek pressure on the comb of your stock. Height of rings does not affect elevation on target but it is imperative that your scope be parallel to the bore of the rifle or you will run out of adjustment as you have in this case.

Based on the picture posted, your scope appears to be pointed "downhill", which would cause problem of running out of adjustment/high impact on target. Raising the front end of scope will lower POI (as will lowering the rear end).

The Signature rings allow for aligning the axis of the scope with your rifle bore by selecting proper thickness and combination of inserts (.005, .010 and .015"). For example, using two .015" inserts (one in front ring and other in rear ring), you could obtain up to .030" more height of the front of your scope which is probably more than you need.

Offhand, I'd try a .015" insert in the front ring w/thick part down. This would raise your cross hairs (and lower POI on target). May not be quite enough but using a .005 in rear w/thick part up could then be added. (Rings come with two sets of 0" inserts)

First, I'd find center of tube by counting clicks starting at one extreme or the other, then count half that number and you'll have equal amount of elevation adjustment ^ or v. Then, use the correct inserts to bore sight the rifle. This should get you on paper @ 100 with plenty of adjustment left on your scope.

Good discussion as to how to determine how much shim you need here:
http://www.predatormastersforums.com/forums/ubbthreads.php?ubb=showflat&Number=1103505

Regards,
hps
 
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