Description
Rifle Scope Product Details
Burris 201940 Xtreme Tactical XTR
BSC201940 Reticle: Mil-Dot Features: -Extra-large, ultra-premium lenses unsurpassed resolution, clarity, and brightness.-Hi Lume multicoating boosts clarity and, enhanced with new StormCoat.-Water to bead and shed off for a clearer view.-Scope tubes are 30 mm.-Double-force coil spring suspension locks the inner tube in place for unfailing accuracy.-Side turret-mounted parallax adjustment systems.-Integrated side turret-mounted illumination system.-Waterproof, fog proof, shockproof and warranted forever.-Available reticles: Mil-Dot and Ballistic 14X Mil-Dot.-Magnifications: 4-16 x 50 mm.-Click Value (in. @ 100 yards)Elevation: 1 MOA.-Click Value (in. @ 100 yards)Windage: 25 MOA.-Max Adj. (in. @ 100 yards): 74.-Eye Relief: 3.3” to 3.8”. Color/Finish: -Matte finish. Specifications: -Field of View (in feet @ 100 yards): 27 Low – 7.5 High.-Exit Pupil (mm): 12 Low-3.1 High. Dimensions: -Length: 15.7”.
Rifle Scope Product Features
50mm objective lens
2nd focal plane
Tactical MOA turrets
Waterproof and fogproof
Illuminated reticle
About the Burris Company
Burris is a premium manufacturer for firearm scopes, optics, mounts, and other components used for firearms like rifles and long guns. They style and manufacture their scopes and related products by making the most of building materials which are durable and long lasting. This includes the Burris 201940 Xtreme Tactical XTR by Burris. For more shooting products, visit their website.
Optic Details
Rifle scopes permit you to specifically aim a rifle at different targets by aligning your eye with the target over a range. They do this through zoom by making use of a series of lenses inside the scope. The scope’s positioning can be adjusted to account for many environmental considerations like wind and elevation increases or decreases to account for bullet drop.
The scope’s purpose is to help shooters understand exactly where the bullet will land based on the sight picture you are seeing through the scope as you align the scope’s crosshair or reticle with the target. Most modern-day rifle scopes and optics have about eleven parts which are found internally and externally on the scope. These parts consist of the rifle scope’s body, lenses, adjustment turrets, focus rings, and other parts. Learn about the eleven parts of rifle scopes.
Rifle Optic Styles
Rifle scopes can be either “first focal plane” or “second focal plane” type of optics. Finding the optimal type of rifle glass is based around what type of shooting you plan to do.
About First Focal Plane Glass
Focal plane scopes (FFP) feature the reticle in front of the zoom lens. This induces the reticle to increase in size based upon the level of zoom being used. The benefit is that the reticle measurements are the same at the magnified range as they are at the non magnified range. One tick on a mil-dot reticle at one hundred yards without “zoom” is still the same tick at 100 yards by using 5x “zoom”. These types of scopes are valuable for:
- Quick acquisition, far away kinds of shooting
- Shooting situations where calculations are very little
- Experienced shooters who understand their target “hold over” and also “lead” correlations for their firearms
- Shooters who do not mind the reticle is enlarged and takes up more visual sight room than a SFP reticle
Second Focal Plane Optics
Second focal plane glass (SFP) come with the reticle to the rear of the zoom lens. This induces the reticle to remain at the same size in relation to the volume of magnification being used. The result is that the reticle dimensions adjust based on the zoom employed to shoot over lengthier ranges since the markings represent various increments which vary with the zoom. In the FFP illustration with the SFP optic, the 5x “zoom” one hundred yard tick measurement would be 1/5th of the non “zoom” tick. These particular sorts of glass are useful for:
- Far away types of shooting where shooters have more time to make ballistic computations
- Shooting where most shots happen within shorter proximities and ranges
- Shooters who want a clearer optic sight picture with less space taken up by the enlarged FFP reticle
Details on Rifle Scope Zoom
The amount of scope magnification you need is based on the type of shooting you intend to do. Pretty much every kind of rifle glass gives some degree of magnification. The quantity of zoom a scope delivers is established by the dimension, thickness, and curves of the lens glass inside of the rifle optic. The magnifying level of the optic is the “power” of the scope. This signifies what the shooter is aiming at through the scope is amplified times the power element of what can normally be seen by human eyes.
Single Power Lens Rifle Glass
A single power rifle optic comes with a magnification number designator like 4×32. This implies the zoom power of the scope is 4x power and the objective lens is 32mm. The zoom of this type of scope can not fluctuate because it is a fixed power optic.
Info About Adjustable Power Lens Glass
Variable power rifle scopes use variable power levels. The power adjustment is accomplished by the power ring part of the scope near the back of the scope by the eye bell.
The Power and Range of Rifle Scopes
Here are some recommended scope powers and the ranges where they could be successfully used. Always remember that higher power optics and scopes will not be as efficient as lower powered optics and scopes due to the fact that too much magnification can be a negative thing in certain situations. The exact same concept goes for longer ranges where the shooter needs enough power to see precisely where to best aim the rifle.
Details on Lens Coverings
All top teir rifle optic lenses are covered. Lens finishing can be a crucial element of a shooting platform when buying high end rifle optics and scope equipment.
HD Versus ED Optic Lens Coatings
Some glass suppliers additionally use “HD” or high-def glass finishes that apply different processes, polarizations, elements, and chemicals to extract separate colors and viewable target visibility through the lens. This high-definition finishing is typically used with more costly, high density lens glass which lowers light’s opportunity to refract by means of the lens glass. Some scope brands use “HD” to refer to “ED” indicating extra-low dispersion glass. ED handles how colors are presented on the chroma spectrum and the chromatic difference or aberration which is also called color distortion or fringing. Chromatic aberration can be obvious over objects with hard edges and outlines as light hits the object from particular angles.
Single Covering Versus Multi-Coating for Optics
Different optic lenses can likewise have various finishings applied to them. All lenses usually have at least some type of treatment or finish used to them prior to being used in a rifle scope or optic.
Single covered lenses have a treatment applied to them which is generally a protective and improving multi-purpose treatment. This lens treatment can safeguard the lens from scratches while reducing glare and other less helpful things experienced in the shooting environment while sighting in with the optic. The quality of a single layered lens depends on the scope producer and how much money you spent on it. Both the manufacturer and amount are indicators of the lens quality.
Some scope manufacturers likewise make it a point to specify if their optic lenses are coated or “multi” coated. This suggests the lens has had multiple treatments applied to the surfaces. If a lens receives numerous treatments, it can establish that a producer is taking several actions to combat various environmental elements like an anti-glare coating, a scratch resistant anti-abrasion covering, followed by a hydrophilic finish. This also doesn’t always imply the multi-coated lens is better than a single layered lens. Being “better” depends on the producer’s lens treatment techniques and the quality of products used in building the rifle scope.
Hydrophobic Lens Coverings
Water on a lens doesn’t support retaining a clear sight picture through a scope in any way. Lots of top of the line and premium scope makers will coat their lenses with a hydrophobic or hydrophilic coating. The Steiner Optics Nano-Protection is a good example of this type of treatment. It deals with the surface area of the Steiner optic lens so the water molecules can not bind to it or develop surface tension. The result is that the water beads roll off of the scope to keep a clear, water free sight picture.
Rifle Scope Installation Choices
Installing solutions for scopes come in a couple of choices. There are the standard scope rings which are separately mounted to the optic and one-piece scope mounts which cradle the scope. These different types of mounts also typically are made in quick release variations which use manual levers which allow rifle shooters to rapidly mount and remove the optics.
Hex Key Rifle Scope Ring Mounts
Basic, clamp-on style mounting scope rings use hex head screws to install to the flattop style Picatinny scope mount rails on the tops of rifles. These types of scope mounts use a pair of individual rings to support the optic, and are normally made from 7075 T6 billet aluminum or similar materials which are manufactured for long distance precision shooting. This kind of scope mount is very good for rifles which are in need of a durable, hard use mount which will not move despite just how much the scope is moved or jarring the rifle takes. These are the style of mounts you should have for a devoted scope setup on a long distance scouting or competitors firearm which will pretty much never need to be changed or recalibrated. Blue 242 Loctite threadlocker can additionally be used on the screws to stop the hex screws from backing out after they are installed firmly in place. An example of these rings are the 30mm style from the Vortex Optics company. The set normally costs around $200 USD
Quick-Release Cantilever Rifle Optic Rings
These kinds of quick-release rifle scope mounts can be used to quickly attach and detach a scope from a rifle. Several scopes can also be swapped out if they all use a complementary designed mount. The quick detach design is CNC crafted from anodized 6061 T6 aluminum and the mounting levers fasten firmly to a flat top design Picatinny rail. This allows the scope to be sighted in while on the rifle, removed from the rifle, and remounted while preserving the original sighting settings. These kinds of mounts are useful and beneficial for shooting platforms which are moved around a lot, to remove the glass from the rifle for protection, or for aiming systems which are utilized in between numerous rifles. An example of this mount type is the 30mm mount from Vortex Optics. It generally costs around $250 USD
About Optic Tube Sealing and Gas Purging
Wetness inside your rifle scope can destroy a day of shooting and your expensive optic by triggering fogging and producing residue inside of the scope tube. The majority of scopes avoid moisture from getting in the scope tube with a system of sealing O-rings which are water resistant.
Rifle Glass Gas Purging
Another component of preventing the accumulation of moisture inside of the rifle optic’s tube is filling the tube with a gas like nitrogen. Considering that this area is currently taken up by the gas, the scope is less affected by temperature level shifts and pressure variations from the outside environment which may possibly enable water vapor to permeate in around the seals to fill the void which would otherwise be there. These are good qualities of a decent rifle scope to seek out.
