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December 30th, 2020
Burris Signature Rings with polymer inserts are an excellent product. The inserts allow you to clamp your scope securely without ring marks. Moreover, using the matched offset inserts you can “pre-load” your scope to add additional elevation. This helps keep the scope centered in its elevation range while shooting at long range. Additionally, with a -20 insert set in the front and a +20 insert set in the rear, you may be able to zero at very long ranges without using an angled scope base — and that can save money. (To move your point of impact upwards, you lower the front of the scope relative to the bore axis, while raising the rear of the scope.)
Insert Elevation Values and Ring Spacing
People are sometimes confused when they employ the Burris inserts. The inset numbers (-10, +10, -20, +20 etc.) refer to hundredths of inch shim values, rather than to MOA. And you need the correct, matched top/bottom pair of inserts to give you the marked thousandth value. Importantly, the actual amount of elevation you get with Burris inserts will depend BOTH on the insert value AND the spacing between ring centers.
Forum member Gunamonth has explained this in our Shooters’ Forum:
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Working with Burris Signature Rings
Burris inserts are [marked] in thousandths of an inch, not MOA. To know how many MOA you gain you also need to know the ring spacing. For example, with a -20 thou insert set in the front and a +20 thou insert set in the rear, if the ring spacing is 6″, the elevation change will be approximately +24 MOA upwards.
Here’s how we calculate that. If you have a 2 X 0.020″ “lift” over a distance of 6 inches (i.e. 0.040″ total offset at 0.5 feet) that’s equivalent to 0.080″ “lift” over 12 inches (one foot). There are 300 feet in 100 yards so we multiply 0.080″ X 300 and get 24″ for the total elevation increase at 100 yard. (Note: One inch at 100 yards isn’t exactly a MOA but it’s fairly close.)
Here’s a formula, with all units in inches:
Total Ring Offset
——————– X 3600 = Change @ 100 yards
Ring Spacing
(.020 + .020)
—————– X 3600 = 24 inches at 100 yards
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NOTE: Using the above formula, the only time the marked insert offset will equal the actual MOA shift is when the center to center ring spacing is 3.60″. Of course, you are not required to use 3.60″ spacing, but if you have a different spacing your elevation “lift” will be more or less than the values on the inserts. |
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December 15th, 2015
For years we have touted the advantages of Burris Signature rings, with polymer Pos-Align Inserts. Now this system is available in a beefier, heavy-duty ring system for tactical rifles. The new Burris XTR Signature Rings offer six (6) clamping bolts per ring plus strong, dual steel base-clamps that self-center on Weaver or Picatinny rails. These aluminum XTR Signature Rings provide strength and holding power, plus the key benefits of Pos-Align inserts. As impressive as XTR rings are — they aren’t that expensive, with 1″-diameter XTRs starting at about $90.00 per pair (30mm and 34mm XTRs cost a bit more).
The polymer inserts in Signature rings perform three key functions. First, the inserts provide full, uniform scope-to-ring contact, with no need for lapping. You get a very secure “grip” on your scope without ring marks. Second, the Pos-Align inserts can provide elevation “pre-load”. With eccentric (offset) inserts, you can raise the back of the scope relative to the front, gaining up to 54 MOA of built-in elevation, without the need for expensive tapered bases. Third, the offset inserts can be rotated clockwise or counter-clockwise to shift point of impact. This lets you zero your rifle easily while keeping the turrets in the center of their travel.
Burris XTR Signature Rings are offered in 1″, 30mm, and 34mm diameters, and three (3) different heights: 1″, 1.25″, and 1.5″. Each ring set includes two sets of concentric inserts and one set each of the following offset inserts: +/-5 MOA, +/-10 MOA, +/-20 MOA. These allow you to “pre-load” elevation and/or center up your cross-hairs.
– Pre-load Elevation. No need for expensive tapered bases for long-range shooting.
– Correct misalignment caused by off-center receiver holes.
– Correct for bases or rings being slightly off-center.
How to Pre-load Elevation
To add elevation, set the Pos-Align Offset Inserts to raise the rear of the scope and lower the front. As long as there remains sufficient clearance between the front objective bell and the barrel, Burris recommends lowering the front of the scope the most and raising the rear of the scope the least. The amount of actual elevation “pre-load” will depend on the ring spacing (see chart). In the illustration, with 4.75 inches between ring centers, a +/- 20 MOA pair in the front combined with a -/+ 5 MOA pair in the rear will yield +25 MOA of total elevation. (If the rings are positioned further apart, you’ll get less elevation pre-load.)
Using Inserts to Adjust Point of Impact in Any Direction
Although it is convenient and most understandable to refer to the ring inserts as a “bottom” or “top” insert, the inserts may be rotated to any angle within the scope rings. This allows the shooter to correct the point-of-impact in any direction. The drawings below show how the inserts can be rotated to induce both elevation and windage changes at the same time.
Product tip from Boyd Allen. We welcome reader submissions.
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October 23rd, 2013
 Burris Signature Rings in Stock Again
Because they allow you to mount a scope without markings, to “pre-load” elevation, and to correct for windage mis-alignment, Burris Signature Rings (with Pos-Align inserts) are extremely popular. So popular in fact that Signature Rings, particularly the “Zee” models for Weaver rails, have been hard to find. Well, Signature Ring fans can now celebrate. Burris has recently shipped large supplies of Signature Rings, including the hard-to-find 30mm High Zees, to vendors across the country. If you’ve been waiting on these unique, affordable ring sets, get your orders in now.
Records Have Been Set with Signature Zee Rings
Are Signature Zees good enough for competition? Absolutely. Some folks scoff at these Burris rings, given their low price. A set of 1″-diameter Sig Zees cost less than $35.00 at Midsouth Shooters Supply. But consider this, Rodney Wagner shot the smallest 600-yard group in history, a 0.359″ 5-shot stunner, using Signature Zee Rings on his IBS Light Gun. Here’s a photo of Rodney showing the record-setting rifle, outfitted with affordable Signature Zee 30mm rings.
Vendors Have Burris Signature Rings in Stock Now
A quick search of webstores shows that various models of Burris Signature Rings are available from many vendors. NOTE: You may have to check with more than one seller to get the exact size, height, and model you prefer. But right now Midsouth has a very complete selection of Signature Zees, including the hard-to-find 30mm High and Extra High models.
Midsouth Shooters Supply: Wide selection — 1″ and 30mm Signature Zee (including 1″ Nickel-finish), Universal, Dual Dovetail, and 1″ Rimfire Signature Zee.
Eabco.com: Signature Zee 1″ and 30mm, Medium and High, Weaver Base, starting at $37.00.
Bruno Shooters’ Supply: 1″ and 30mm Signature and Universal, 1″ Rimfire Signature Zee (Call for availability of sizes).
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June 18th, 2012
Burris Signature Rings in Stock Again
Because they allow you to mount a scope without markings, to “pre-load” elevation, and to correct for windage mis-alignment, Burris Signature Rings are extremely popular. So popular in fact that Signature Posi-Align Rings, particularly the “Zee” models for Weaver rails, have been back-ordered for months. Well, Signature Ring fans can now celebrate. Burris has recently shipped large supplies of Signature Rings, including the hard-to-find 30mm High Zees, to vendors across the country. If you’ve been waiting on these unique, affordable ring sets, get your orders in now.
A quick search of webstores shows that various models of Burris Signature Rings are available from all of the following vendors. NOTE: You may have to check with more than one vendor to get the exact size, height, and model you prefer. Inventories are subject to change on a daily basis. For example, Midsouth expects to get some more 30mm Signature Zee High rings in a couple days from now.
Bruno Shooters’ Supply: 1″ and 30mm Signature and Universal, 1″ Rimfire Signature Zee (Call for availability of sizes).
Eabco.com: Signature Zee 1″ and 30mm, Medium. (High — call for availability).
Midsouth Shooters Supply: Wide selection — 1″ and 30mm Signature Zee, Universal, Dual Dovetail, and 1″ Rimfire Signature Zee. (NOTE: 30mm Signature Zee High expected 6/19/2012.)
Sinclair International: 1″ and 30mm Signature Zee, Universal, and Dual Dovetail. (30mm High and Xtra-High Zees out of stock temporarily).
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June 25th, 2010
 MidwayUSA is running a sale right now on Burris Signature and Signature Zee scope Rings and Pos-Align inserts. The Burris Signature Rings feature polymer inserts that fit between the scope tube and the ring itself. This protects the scope finish and also allows the scope tube to self-align within the rings. By using offset inserts with different thicknesses, you can keep your scope centered in its range of travel. You can also use the offset inserts to pre-load elevation into your scope, thus avoiding the need to purchase an expensive angled base for shooting at long ranges.
As examples of the current savings, Burris 1″ Signature Zee Weaver-Style Rings High Rings are marked down from $36.99 to $32.99. A set of Burris 1″ Pos-Align Offset Inserts (.005, .010 and .020) is now just $10.99, marked down from $14.99.
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