View Full Version : shim rings, bases or other ?

August 14, 2009, 08:54 PM
Bought a new 22 Anschutz BR rifle the other week but have not been able to fire a shot through it until I can get the scope to to point in a direction close to sentre.

I had a pair of #19 Weaver bases tossed in the box which mount just fine to the receiver and had intended to use a scope I already had rather than buy another with the rifle draining the bank just a tad, anyway the Bushnell 3200 5-15 X 50 in nearly new condition but have found that finding zero on the 22 at 50yds is impossible as the click adjustment comes to an end with still another 8" - 10" still to go.

The click adjustment range is 75 clicks top to bottom which worked fair enough on my 25-06 but with these high rings needed to allow clearance of the scope/heavy barrel (with high rings it's about 3/16" clearance) the large angle between scope and bore is increased to where my calculations say it needs at least +.025" on the rear base or adjustable ring to get it close, and to make it worse it will almost certainly need some windage on the ringset.

I have tried two different weaver base rings and also a pair of 11mm rings as the receiver is also cut, but neither come close to centre, the problem with a simple shim under the rear base is that the receiver is not flat but has an odd angled cut pattern by our German friends put on top of the receiver which makes it all a real PITA.

I'm sort of out of ringsets and ideas, or do I buy a decent pair of Leupold rings with matching bases that are adjustable, the second drama is they have to fit this new model 64SBR Anschutz.

Any ideas ? coz i'm starting to like the idea more and more of going hunting with a 7mm rather than this BR.

August 14, 2009, 10:14 PM
Hmmm. You are saying the bullet is impacting so far below the sight line that you can't adjust the scope that far down? In that case I think I would see if you can't buy a pair of long range ring bases? You can get them with the rear sight elevated in a number of angles, with 20 moa being most common. They are for allowing enough adjustment to hit 1000 yard targets with a high power rifle, but not enough elevation means the same thing, no matter the range.

If you shim the base, you take the rings out of coaxial alignment and can mark or even slightly distort the scope tube. You might be able to lap them in to compensate? Depends on the rings. Burris Signature Zee rings are ball-and-socket and would let you shim without that problem. I think the long range bases are the easiest solution if they are made that fit your receiver?

August 14, 2009, 11:27 PM
The easiest solution is a set of the Burris rimfire Signature Zee rings with the offset insert kit. You just change or move the inserts to point the scope up or down, or left or right to keep the point of aim aligned with the barrel. You won't have to shim the rings.

August 15, 2009, 04:00 AM
Thanks for the input, i'll check em out.

August 17, 2009, 01:00 AM
Thank you again, these Signature Zee rings are a real first rate clever design product, probably should have checked them out better when choosing ringsets and bought these first up but there are literally hundreds to choose from.

Now able to set-up the scope with the adjusters in their middle range and virtually find zero without touching them, although that would be a fluke but it's possible, however it now makes a dozen clicks as a big adjustment and keeps the reticle basically cantered in the tube, only needed to seriously mess with the adjusters at the 100 yard matches.

I went back to checking the stats of the total adjustment range of this and various other scopes, just happens that this model 3200 Bushnell 5-15X50 gave me only 20" of total range of adjustment at 50 yards, while many other scopes have substantially more, some double that.
That meant with the scope set high to miss the heavy barrel plus having the adjusters set to the middle mark I was only getting a logical 10" range at 50 yards, and not really enough in practical terms.

Anyway, all good.