Scope Sliding

jnewing

jnewing

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I'm having a bit of an issue. I have a Vortex 30mm scope mounted on my Savage 10 (308), mounted using Burris XT Rings 30mm. I installed the scope using a torque screwdriver set to the exact manufactures specs. However after a few shots the scope starts to slide back towards my face just a bit, a few shots later it I noticed it's crept a little more backwards :/ it will continue to do so until the turrets stop it..

I have no idea why, or what I've done wrong, whats causing this. Help me please.
 
is there any oil/grease/lube on the scope tube or inner rings. That will allow the scope to slide, btdt. Make sure they are both free of lube when bolting up.
 
jnewing said:
I'm having a bit of an issue. I have a Vortex 30mm scope mounted on my Savage 10 (308), mounted using Burris XT Rings 30mm. I installed the scope using a torque screwdriver set to the exact manufactures specs. However after a few shots the scope starts to slide back towards my face just a bit, a few shots later it I noticed it's crept a little more backwards :/ it will continue to do so until the turrets stop it..

I have no idea why, or what I've done wrong, whats causing this. Help me please.
Click to expand...

And usually the scope ocular bell or the power ring that stops it from further movement ....not the turret..... In my experience anyway.
 
As LeftFootofDoom mentioned, ensure that your rings are completely clean and degreased. I always coat the inside f the rings with powdered rosin. Never had a scope slip. Maybe I'm lucky or maybe the rosin works. Can't hurt though.
 
LeftFootOfDoom said:
is there any oil/grease/lube on the scope tube or inner rings. That will allow the scope to slide, btdt. Make sure they are both free of lube when bolting up.
Click to expand...

I don't think so, I cleaned them both prior to installing, perhaps I need to take it off and clean with a degreaser of some kind?
 
It's been awhile since I've had rings slip. The last ones were relatively pricey TPS with their torque one side method. If scopes are moving there is a problem, and although I resorted to band-aid solutions like tire patch cement in the past the best is to get to the root of the problem.

First off, get rid of any junk. There's enough Cheapo aluminum off brand junk out there to keep ammo makers busy. Junk will float around, and until someone finally throws it away will haunt owner after owner.
Assuming that you have something decent to begin with, and that the ring halves aren't bottomed out already, lap the rings. Many combinations are so badly out of alignment that only a tiny percentage of the available area is touching. Besides slipping the other problem is that bending your scope to fit misaligned rings isn't doing your scope any favours. After lapping, make sure the ring halves dont bottom out before the scope is clamped into place.
 
I don't know guys. I oil mine intentionally and I've never had one slip. I'm guessing either the tube or the rings are out of spec. The .308 is hardly a brusier. I guess anything is possible though.

If you have the option OP, replace either the scope or the rings as a process if elimination. You will likely discover the culprit. My bet is the rings. If so, follow advise above.
 
labrador76 said:
I don't know guys. I oil mine intentionally and I've never had one slip. I'm guessing either the tube or the rings are out of spec. The .308 is hardly a brusier. I guess anything is possible though.

If you have the option OP, replace either the scope or the rings as a process if elimination. You will likely discover the culprit. My bet is the rings. If so, follow advise above.
Click to expand...

They are cheaper rings they are Burris XT Rings http://www.burrisoptics.com/mounting-systems/rings/xtreme-tactical-rings since I like my scope I guess I would start by replacing the rings. As I don't have a lapping kit, nor do I have access to one.
 
There is no way that a scope should slide backwards under recoil, if anything, it should slide forward. I would clean and degrease everything and remount them. If you are using a lead sled, top using it.
 
stubblejumper said:
There is no way that a scope should slide backwards under recoil, if anything, it should slide forward. I would clean and degrease everything and remount them. If you are using a lead sled, top using it.
Click to expand...

I have no idea, I'm not using a lead sled, TBH I didn't even know what one was. I just shoot with a bi-pod on the front and a small (bean filled) bag under the buttstock.
 
The behaviour of your scope tube movement is "very unusual" unless some part of the scope mounting system is striking the scope while the rifle is under recoil and causing the scope to be driven back....otherwise the inertia of the scope will cause it to stay where it is when the rifle is under recoil (if the rings are not secured to the scope tube) and you should be finding the scope moving forward relative to the mount .. not back as you describe. VERY VERY unusual!

I have heard of some spring air rifles behaving this way... are there "regular" beans in the bag .. and not those "Mexican jumping beans"?
 
If loose enough it will move forward under recoil followed by back Start with replacing the rings Obviously what you have is not working so you have nothing to lose Are you sure the torque wrench is working properly ? usually there is a bit of room on the specs as in 15-18 in/lbs try the upper end after cleaning the contact surfaces , rubbing alcohol usually does it for me Are you using the correct bases for the rifle and compatible rings ?
 
caskenette said:
If loose enough it will move forward under recoil followed by back Start with replacing the rings Obviously what you have is not working so you have nothing to lose Are you sure the torque wrench is working properly ? usually there is a bit of room on the specs as in 15-18 in/lbs try the upper end after cleaning the contact surfaces , rubbing alcohol usually does it for me Are you using the correct bases for the rifle and compatible rings ?
Click to expand...
it would have to be pretty darn loose for that to happen...ie loose enough for the weight of the top turret to fall over to the right......UNLESS something was striking the scope during the recoil cycle hard enough for the scope to bounce..it's just.VERY unusual.
 
Can't see how a scope can move backwards unless there is some sort of recoil spring that moves the rifle forward and even then the force would be a fraction of the recoil.
 
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