I ran into a problem last week where a Burris Signature scope ran out of adjustment. It is mounted on a Weatherby Vanguard in 30-06 using Leupold std rings and mounts, have had it for about 10 years. I was shooting it last week, and when going from 100 to 200 yards, it would not adjust in elevation any more, about five clicks before I hit the stop. This was admittedly a slower load (165gr bullet at 2500 fps), and I have not had problems adjusting it when shooting the same bullets at 2700-2800 fps. I ran the dial either way and have around 170 clicks total (around 42MOA). I am thinking that for some time it was simply near the end of its adjustment and I never noticed it.

So I went to the Burris website and their FAQ section states that they hear of this issue frequently. Their solution is to go with Burris rings with inserts and use shims to bring the scope into alignment, as it has less adjustment than "cheaper" scopes (hm, never had this problem with the Leupold that was on the same rifle).

My question - if I get the Burris rings with inserts, I want to add shims to raise the rear base/ring, right? (like the extra MOA bases for the tactical LR rifles) I am thinking of putting the scope at mechanical "zero" (middle of el edjustment), putting it in a boresight posture, and adding shims until the scope and bore align at 25 yards. Then go from there to rezero. Seem sound or is there a better way?

Sputster, the Burris Signature rings use concentric inserts to adjust scopes that need to be pre-aligned prior to final adjustments shooting at sight-in. If I remember correctly they come with correction shims as well as the non-adjustable style in the package. You would need to raise the ocular(rear) end of the scope to raise the POI. These rings, IMO, are a better solution than shimming under the scope base.

Get the 20 MOA rail and the Burris rings to fit it with the eccentric inserts.

Set scope at optical center and proceed per the instructions.

Hope your scope is 1" as the eccentrics are available in +- 10 & 20, 30mm only +-10.

Bonus is no marks on tube.

I have had two catastrophic failures with Burris scopes. Won't use them.

Sounds like the Burris rings are a way. Will try them out. Thanks.

I would agree that the pacific rim Burris scopes are junk, but the older USA made ones were just as good as Leupolds of the same times.
The rings are unique and work very well. Why anyone uses those ugly Talley rings is a complete mystery to me. If you want "pretty" there are S&K and Conetrol that also have built in windage in both bases, something that Talley has yet to learn and NO Talleys are not in perfect alignment on every rifle. The Burris, S&K and Conetrol are self aligning ..... i.e. no lapping needed.

quote:

I would agree that the pacific rim Burris scopes are junk, but the older USA made ones were just as good as Leupolds of the same times.

Their Signature line has always been made in the USA.

This particular problem appears to be nothing to do with the scope itself and if Burris supplies ring inserts to correct it, they are trying to help.

The crosswires should be as close as possible to centre of the adjustments for best optical performance, so a fair bit of shimming might be needed.

If you use a 20MOA rail and the Burris ecentric rings, no shims will be needed.