Tasco scope rings mount scope off centre, not sure how to fix

neoconfection

neoconfection

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I have a Tasco 3–9x 32mm .22 scope mounted on my Remington 597 using the 3/8" rails. Everything mounts easily and fits well, but regardless of how many times I adjust the scope rings (tighter, looser) or how they attach to the rail, the scope is still off centre from the bore, leaning to the right. I haven't had a chance to take it to the range to see if it will make a difference.

I just have a couple of questions:

-What is the most likely cause of the off-centre scope?
-Would a better set of rings fix this problem?
-Is it going to affect my accuracy on the range?

Thanks for your help. Sorry for what might be a newbie question.
 
Take your rings off and spin them 180° and put them on with the screw/bolt facing the other way, if it now leans to the left instead of the right your rings are messed up.
if you do this and it is still leaning to the right then either your bases are messed up, or the holes for the bases are tapped a bit off to the side.
 
Don't mean to sound like a ####, but the best solution for this is to spend more than $12 for a set of rings. Reversing the rings, or reversing just one of them, might appear to improve the situation, but who knows what kind of weird pressures and stresses it would be inflicting on that scope? A set of rimfire rings from Millett or Weaver will be a nice upgrade for only a few dollars.
 
jjohnwm said:
Don't mean to sound like a ####, but the best solution for this is to spend more than $12 for a set of rings. Reversing the rings, or reversing just one of them, might appear to improve the situation, but who knows what kind of weird pressures and stresses it would be inflicting on that scope? A set of rimfire rings from Millett or Weaver will be a nice upgrade for only a few dollars.
Click to expand...

The Millet rings I bought were exactly 12 dollars :)
 
neoconfection said:
The Millet rings I bought were exactly 12 dollars :)
Click to expand...

Smartass! :)

At least the holes are in a straight line, or else you wouldn't have been able to put the rail on at all. And since the receiver is tubular, that pretty much insures that the rail, and thus the scope, will be parallel with the bore, assuming that the barrel isn't mounted crooked as well. So, basically, the scope will be pointing in the correct direction, just very slightly off TDC. It will be similar to holding the rifle canted off to the side...not exactly the same situation, but at the ranges at which you will probably be shooting this gun, I don't think you have too much to worry about. On the other hand, if it bugs you now, its only gonna get worse with time.

Is the gun new? If so, why not talk to the dealer and see about an exchange? If the gun is not new, a gunsmith could re-drill and re-tap the receiver top (and maybe re-drill the rail if necessary) and then remount the rail so as to cover up the offending holes. Swiss-cheesing the receiver isn't exactly an elegant solution, but it's a Rem597, not an Anschutz. Done right, it will be invisible and totally functional.

By the way...you mentioned a 3/8-inch rail. Doesn't that gun have integral 3/8-inch grooves on the receiver? If you are mounting a rail, isn't it a Weaver rail? If you are actually screwing on a 3/8-inch rail, you might as well just pitch it, forget about the off-center holes, and mount directly to the grooves on the gun.
 
jjohnwm said:
Smartass! :)

At least the holes are in a straight line, or else you wouldn't have been able to put the rail on at all. And since the receiver is tubular, that pretty much insures that the rail, and thus the scope, will be parallel with the bore, assuming that the barrel isn't mounted crooked as well. So, basically, the scope will be pointing in the correct direction, just very slightly off TDC. It will be similar to holding the rifle canted off to the side...not exactly the same situation, but at the ranges at which you will probably be shooting this gun, I don't think you have too much to worry about. On the other hand, if it bugs you now, its only gonna get worse with time.

Is the gun new? If so, why not talk to the dealer and see about an exchange? If the gun is not new, a gunsmith could re-drill and re-tap the receiver top (and maybe re-drill the rail if necessary) and then remount the rail so as to cover up the offending holes. Swiss-cheesing the receiver isn't exactly an elegant solution, but it's a Rem597, not an Anschutz. Done right, it will be invisible and totally functional.

By the way...you mentioned a 3/8-inch rail. Doesn't that gun have integral 3/8-inch grooves on the receiver? If you are mounting a rail, isn't it a Weaver rail? If you are actually screwing on a 3/8-inch rail, you might as well just pitch it, forget about the off-center holes, and mount directly to the grooves on the gun.
Click to expand...

The gun is new, but from what I've seen fixing it or having it replaced is too much of a hassle/cost to justify (since it was a $150 gun).

The 3/8" groove and the screw holes are parallel to each other, but are off-centre on the gun. That's why regardless of if I used the groove rail or the Weaver rail, the scope was off-centre exactly the same direction (slightly to the right).

My bubba fix for the time being has been to cut a small picture frame nail in half, and put each half on the left and right sides of the front and rear mount, respectively, which offsets the defective grooves/holes enough for the scope to be close enough to centred not to bother me.
 
dand883 said:
Take your rings off and spin them 180° and put them on with the screw/bolt facing the other way, if it now leans to the left instead of the right your rings are messed up.
if you do this and it is still leaning to the right then either your bases are messed up, or the holes for the bases are tapped a bit off to the side.
Click to expand...

jjohnwm said:
Don't mean to sound like a ####, but the best solution for this is to spend more than $12 for a set of rings. Reversing the rings, or reversing just one of them, might appear to improve the situation, but who knows what kind of weird pressures and stresses it would be inflicting on that scope? A set of rimfire rings from Millett or Weaver will be a nice upgrade for only a few dollars.
Click to expand...

I wasn't trying to get him to torque the scope down in crooked rings, i was offering advice to rule out the rings themselves before troubleshooting what needed to be replaced
 
dand883 said:
I wasn't trying to get him to torque the scope down in crooked rings, i was offering advice to rule out the rings themselves before troubleshooting what needed to be replaced
Click to expand...

Turns out the screw holes and the dovetail mount were machined off-centre. Apparently this happens from time to time with 597s.
 
The easiest fix I can think of is Burris Zee Signature rings with inserts.

Someone who's better with numbers can let you know how far 20 moa inserts will move the scope.
 
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