View Full Version : What to do when scope won't adjust far enough

Jack Straw
January 12, 2002, 03:32 PM
I guess you can see that I have a number of gun issues that I need to take care of...

I just put a scope on my old Remington .22 and took it out today to sight it in. I adjusted the thing up as far as possible but at 25 yards it still shot about 4 inches low. Now what? The scope worked perfectly fine on a .308 so I don' think that is the problem.


January 12, 2002, 05:55 PM

There are a lot of different ways to correct this problem. The easiest is to make some shims out of an old beer can. First take the scope off and mechanically re-zero it, i.e., dial it back to the center of it's range. Place the shims on the bottom of the front ring. Start with three shims, put the scope back on and shoot. Add or subtract shims until the scope is roughly zeroed. Once your within 2 - 3" of the aiming point then you can use the clicks on the scope to fine-tune.

Other fixes include lapping the rear ring, shimming or lapping the base, or buying Burris POS-ALIGN rings. All valid fixes, first I'd try the old tried and true "beer can shim." -- Kernel

January 12, 2002, 08:16 PM
Kernel nailed it.


Jack Straw
January 12, 2002, 08:44 PM
Thanks for the replies. Dad and I discussed it on the way home and the idea of a shim came up, we just weren't sure that it would actually work or how much to use.

One thing I'm confused about is which end of the scope to shim since the gun is shooting low. Can someone explain why the front of the scope should be shimmed? My brain isn't working to well with the concept of sights today. Dad's Christmas present was a Ruger 10/22 that was hitting high and to the right today and for some reason I kept wanting to move the rear sight in the wrong direction.:confused: Some days it just doesn't pay to skip that second cup of coffee.


January 12, 2002, 11:07 PM
Oooops......you want to shim the rear to bring point of impact up toward the crosshairs.

Reread your first post......might want to shoot it again and adjust scope the other way just to make sure it really neads shimmin.


January 14, 2002, 08:42 PM
Ooops. My bad. Putting the shims under the rear ring will bring the point of impact up. For can-stock I recommend Miller High Life Light. (which is what I was drinking when I gave the wrong advice earlier). -- Kernel

Freedom in theSkies
January 18, 2002, 12:15 AM
I had to do some shimming on a Mini-14 a while back. I used the same sort of technique, with the exception of using aircraft type shim stock. -It comes in large sheets and is about 1/4 inch thick. (250 layers of aluminum) Same basic idea, but you just peel off a piecethat is the right thickness and trim it to size. The main thing is, it worked. :)

January 19, 2002, 02:09 AM
I like Milwaukees Best Ice for shims the best.:D

January 19, 2002, 09:46 PM
i prefer German beer cans
the tolerences are tighter

October 21, 2009, 03:15 PM
Well, what should I use? I drink Whisky!:cool:

October 21, 2009, 03:26 PM
well, drink more, it won't improve your aim but you won't care either I suppose :D

October 22, 2009, 12:47 AM
you might want to look at burris signature rings, they come with adjustable inserts that allow you to do major scope adjustments, then you can use the scope adj to fine tune. Plus the nylon inserts don't mar the scope finish.

my 2c,


mega twin
October 22, 2009, 06:24 AM
Might try just swapping your rings from front to back first.

October 22, 2009, 06:36 AM
Might try just swapping your rings from front to back first.

I think mega twin is going in the right direction with that piece of advice. +1