Scope mounting problem
I am mounting a 8X32 Burris on a 6BR bullberry barrel. It has a leupold base epoxied and screwed to the barrel. I am using double dovetail Burris Signature rings using number ZERO inserts.
My Problem;
The scope front objective adjusting knurling is just barely kissing the barrel it turns fine and leaves no mark on the knurling. It just barely grazes the very tip of the knurling. This is a 19.5" barrel and very heavy 1" diameter with no taper.
Is it OK to leave it alone or should I put some electrical tape under the lower inserts to raise the scope a few thousandths. I really don't want to go to higher rings. Everything is exactly as I want it now.
My Problem;
The scope front objective adjusting knurling is just barely kissing the barrel it turns fine and leaves no mark on the knurling. It just barely grazes the very tip of the knurling. This is a 19.5" barrel and very heavy 1" diameter with no taper.
Is it OK to leave it alone or should I put some electrical tape under the lower inserts to raise the scope a few thousandths. I really don't want to go to higher rings. Everything is exactly as I want it now.
0
-
Ok, to begin with, i had the same problem using the same scope and rings when i put it on my fn PBR. I transferred the rings and scope to a remington 700 varmint special 7mm-08. I was able to fix the problem on the FN, but not on the remington. I am using high millet rings and a bushnell elite 3200 5-15x50mm scope. the problem is that i run out of up and down adjustment during boresighting. the scope is all the way topped out and it is one grid above center still. i tried different rings on same scope. had the same problem. tried same rings and a different scope, same problem. changed bases, same problem. also tried the same scope on a different gun and it was centered, but had no adjustment left. i was able to fix it on the pbr by moving the rings into a different slot on the picatinny rail. any suggestions? i really don't want to shim it, but that is all i think i have left to do. thanks
I'm not an expert, but i did stay in a Holiday Inn Express last night.0 -
My advice would be to not mount the scope until I had somehow removed the obstructing metal on the knurling.
Sandpaper comes to mind, as does a large-surfaced file or Dremel tool.
It might seem easier just to sand off some of the barrel; but that might induce an unevenness to the barrel's harmonics, which might affect group size or point of impact.
If it's just barely, almost touching the barrel, you could add a shim on your front ring (what a PITA) or shave off some scope.
"Qui non est hodie cras minus aptus erit" --OVID0 -
Adding a shim of .001 inch to the front ring is likely to put the the bullet off about 10" at 100 yards. I would suggest a shim in each ring cut from a coke can. 0 -
Get a higher set of rings. Do not alter either the scope or the barrel. 0 -
Put a shim about 25 to 30 thousandths under each end of the base. Be sure the shim is the same thickness on each end. This should raise it enough to solve the problem, you cant shim just one end or you will throw your scope out of level and there may not be enough adjustment in the scope to make it up. Shims can be bought at machine shops,Brownells,Leupold have them. You can cut them out of drink cans or feeler gauges.
A few thousandths can make a big difference most of the time.
<BR>0 -
quote:Originally posted by D.S.COLE
Put a shim about 25 to 30 thousandths under each end of the base. Be sure the shim is the same thickness on each end. This should raise it enough to solve the problem, you cant shim just one end or you will throw your scope out of level and there may not be enough adjustment in the scope to make it up. Shims can be bought at machine shops,Brownells,Leupold have them. You can cut them out of drink cans or feeler gauges.
A few thousandths can make a big difference most of the time.
<BR>
I can't...the base is epoxied and screwed to the barrel. Can I put the shim inside the ring between the insert and the base and accomplish the same thing.0 -
"I can't...the base is epoxied and screwed to the barrel. Can I put the shim inside the ring between the insert and the base and accomplish the same thing." yes you can, this is not a high recoil rig. I suggest you get some powered rosin (brownell's) and dust the rings, shim, & scope were they contact each other. 0 -
Bruce,
"I am using double dovetail Burris Signature rings using number ZERO inserts."
It seems to me that either these came with your scope or they can be purchased for use with your scope. Put the larger correction inserts into the bottom portion of the rings, both front and back. This should raise the scope up just the amount you need for clearance.
Signature Pos-Alignr Offset Insert Kit
Signature Rings also accept Pos-Align Offset Inserts so you can virtually sight-in your gun without moving the scope adjustments. Lens systems perform at their optimum when all lenses are optically centered. By keeping the internal optics centered, you'll see through the scope all of the clarity, sharpness, and brightness that the optics designers intended for you to see. The offset inserts also correct for any mis-alignment caused by receiver holes drilled off center, or the bases or rings being slightly off perfect center. And for you 1000 yard and other long range shooters, the need for expensive tapered bases or shimming becomes a hassle and expense of the past.
Signature Pos-Alignr Offset Insert Kit (1")
Installation Kit 1
"(1 ea. of +/- .005, +/- .010, +/- .020)" 626019
Gunsmith Kit 1
"(10 ea. of +/- .005, +/- .010, +/- .020)" 626024
Individual Inserts 1
1 ea. +/- .005 Eccentric Offset 626016
1 ea. +/- .010 Eccentric Offset 626017
1 ea. +/- .020 Eccentric Offset 626018
ADDED:
These are a good idea. I tried them right after they appeared on the market and they are a real boon for those folks who can't seem to avoid ring marks on their scopes. Scopes come out of the rings unscathed. Even better is the ability to align the scope correctly without using the traditional shimming techniques. You can use them instead of the more expensive corrective MOA rail systems as well. If your scope doesn't have quite enough correction to get you on target at the longer ranges, simply add an insert and go back to the bench.
Best.
0 -
nononsense has it right. I've done this with the Burris Signature Ring inserts on a couple of rifles with good results, plus it's the easiest solution to try...........good luck..............[8D] 0 -
Better than shimming I would say. I may have to try those signature rings... 0 -
I also like those Burris Signature rings, alot, and it's almost impossible to shim a set of double dovetail rings in it's base. The Signature shims or inserts are a boon to this scope mounting problem.
Gun control is hitting what your aiming at.0
Please sign in to leave a comment.
Comments
11 comments