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December 30th, 2020

Signature Rings — Find True Elevation Change of Inserts

Burris signature rings inserts

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.)

Burris Signature Rings

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:

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
6

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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April 9th, 2018

Bargain Finder 133: AccurateShooter’s Deals of the Week

Accurateshooter Bargain Finder Deals of Week

At the request of our readers, we provide select “Deals of the Week”. Every Monday morning we offer our Best Bargain selections. Here are some of the best deals on firearms, hardware, reloading components, optics, and shooting accessories. Be aware that sale prices are subject to change, and once clearance inventory is sold, it’s gone for good. You snooze you lose.

1. Bud’s Gun Shop — T/C Rifles under $280.00 with Rebate

Thompson Center T/C Arms discount Bud's Gun Shop Sale Smith Wesson Rebate

Chose from a host of Thompson Center Arms (T/C) hunting rifles at crazy low prices. Right now T/C is offering a $75.00 Aim to Save Rebate that drops many popular rigs under $280.00. Here are some of the bargains we found, listed by model and chambering. You’ll find these and other great deals on Bud’s Thompson Center Product Page:

T/C Compass, 6.5 Creedmoor 22″ bbl — $354.00 or $279.00 after Rebate
T/C Compass, .223 Remington 22″ bbl — $351.00 or $276.00 after Rebate
T/C Venture, .243 Winchester 22″ bbl — $340.00 or $265.00 after Rebate
T/C Compass, 7mm-08 Remington 22″ bbl — $348.00 or $273.00 after Rebate
T/C Venture, .308 Winchester 22″ bbl — $340.00 or $265.00 after Rebate
T/C Compass, .300 Winchester Magnum 24″ bbl == $348.00 or $273.00 after Rebate

T/C® products qualifying for $75.00 Rebate: Venture, Compass, Dimension, G2 Contender, Encore Pro Hunter, Triumph, T/C® Strike and T/C® Impact.

2. Natchez — Special 5 Reloading Press Kit, $199.99

RCBS Special 5 Reloading Kit

Looking for a great gift for a family member getting started in metallic cartridge reloading? This RCBS Kit has everything a new reloader needs: single-stage press, powder measure, scale, powder trickler, priming tool, cartridge tray, “rocket” chamfer tool, case lube and more. This is an excellent entry-level reloading kit, on sale for just $199.99 at Natchez Shooters Supplies. We like the relatively compact Special 5 press for most reloading duties. Eventually you may want to add an additional, large heavy press, but this will get the job done. For the combined package, with all the tools one needs to hand-load quality ammo — this is a stunningly good deal at $199.99.

3. Amazon — Tipton Compact Range Vise, $16.99

Tipton compact vise Amazon deal sale collapsible rifle cradle

Tipton compact vise Amazon deal sale collapsible rifle cradleHere’s a very handy gun cradle that helps you clean and maintain your rifles while at the range. The Compact Range Vise folds and collapses to 11-1/4″, so it is easily transported. Two padded “V” brackets hold the rifle while protecting the finish during cleaning/maintenance operations. Made from solvent-resistant polymer, the Compact Range Vise is durable and should last for years. No this is not suited for wide-forearm benchrest or F-Open rigs, but for typical hunting and varmint rifles it works well.

Tipton compact vise Amazon deal sale collapsible rifle cradle

NOTE: Amazon may show this “temporarily out of stock”, but you can order the Compact Range Vise for $16.99 and it will ship when available. This sells for up to $31.00 elsewhere.

4. Precision Reloading — Hodgdon H4350 in Stock

Precision Reloading H4350 powder

There has been a long wait, but Hodgdon H4350 powder is now showing up at vendors across the nations. Some of our favorite online retailers have H4350 in stock now, in both 1-pound and 8-pound containers. Precision Reloading has H4350 one-pounders for $26.99 and 8-lb jugs for $216.99. You should probably act quickly, because this may sell out soon. Precision Reloading also has good inventories of other popular powders.

5. MidwayUSA — Norma Match-22 Ammo, 1500 Rounds, $99.99

MidwayUSA Norma Match-22 22 LR Ammo rimfire ammunition

This Norma Match-22 ammunition is good stuff. In many rifles it shoots as well as $8/box products from other makers. But now you can get Match-22 for the equivalent of $3.33 per 50-round box when you buy 30 boxes. MidwayUSA is selling 1500 rounds of Match-22 (three 500-round cases) plus an ammo can for just $99.99. That works out to just 6.7 cents per round. If you don’t need that much .22 LR ammo, you can also buy 500 rounds for $39.99. We think you’ll be happy with this Norma Match-22 ammo. It is a good choice for tactical cross-training, rimfire silhouette, and fun shooting. This Editor ordered a 1500-round can last week.

6. Natchez — Surplus SKB 5041 Transport Cases, $105.99

SKB Rifle Case Military Surplus 50

Natchez has obtained a supply of British MOD Surplus SKB 5041 rifle cases. These were ordered as mine detector cases, but were never issued. Natchez has removed the foam cut for the detectors and replaced it with brand new 2-piece convoluted foam. Interior dimension of the case is 50″x14.5″x5″ so this will hold long-barrel match rifles comfortably. These are extremely high-quality cases, very tough and rugged, waterproof with gaskets. These cases feature four SKB patented trigger latches, four reinforced padlock locations, and inline wheels. Though in excellent condition, some case may have minor exterior scuffs. You won’t find a better case at anywhere near the $105.99 price. These normally retail for $299.99.

7. Amazon — Signature Zee High Rings (with Pos-Align Inserts)

Amazon.com Burris Signature Zee Rings

Burris Signature Zees are our “go-to” rings for use with benchrest rifles. Right now Amazon has the 1″-diameter High Sig Zee rings on sale for $36.94 (Matte Black) or $36.95 (Nickel) plus $8 shipping. Burris also offers medium height 1″-diameter Sig Zees. The 30mm Signature Zee rings are somewhat more expensive (about $54.00), but still well worth the price in our view. This Editor uses 30mm Signature Zee Rings for his personal 6mmBR rifle. The polymer inserts allow you to pre-load elevation, and also eliminate the need to lap your rings.

8. Remington — $100 Cash Back on Model 700 VTR and Magpul

Remington is running a $100 Spring Fever Cash Back Promo on its Model 700 VTR (Varmint Tactical Rifle) and Model 700 Magpul rifles. The 700 Magpul features a strong internal sub-chassis, while the 700 VTR has a unique triangle-countour barrel with integral muzzle brake. The mail-in offers are valid on guns purchased between now and May 1, 2018. There is a limit of five rebates per customer, $100 for each gun. Get details here.

9. CDNN — Smith & Wesson Model 617 10-Shot Revolver, $679.99

This Editor’s first really accurate handgun was a Smith & Wesson model 617 that could easily stack ten shots in a dime at 10 yards. It remains my favorite and most-used handgun, and I will never part with it. What can we say about the model 617? Every serious gun guy should own one. The single-action trigger pull is superb, and the accuracy surpasses most any semi-auto rimfire pistol, except for a few, very expensive target pistols. We like the 6″ version for the longer site radius, but the 4″-barrel 617 is also very accurate, and it balances better. CDNN’s $679.99 sale price may seem like a lot of money, but MSRP is $829.00 and most dealers are charging $750.00 or more for a new 6″-barrel 617. Get one — you won’t regret it.

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June 25th, 2010

Burris Signature Rings and Inserts on Sale at MidwayUSA

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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