Last update on May 29, 2023 // Source: Amazon API
Rifle Scope Product Details
Sightmark Core TX 1-4x24DCR .223/.308 BDC Dual Caliber Riflescope
Sightmark core TX riflescopes use fully multi-coated optics to provide optimal light transmission in a variety of conditions. Etched glass reticles, in Red or green, are illuminated to deliver optimal shot placement and are durable to withstand years of shooting. The core TX riflescopes feature exposed, lockable turrets which help maintain a consistent zero. Turrets are quick and easy to adjust to compensate for bullet drop and windage on the fly. The core TX 1-4x24dcr is housed in a durable 30mm tube, built from Aircraft grade aluminum. This scope features a Duplex BDC reticle and is calibrated for 223 and 308 ammo.
Rifle Scope Product Features
About this item
BDC reticle calibrated for 223 and 308 ammo
Exposed, lockable turrets
Red/green illuminated reticle
Second focal plane reticle
30mm tubed scope
Sightmark Core TX Series
Designed to enhance the performance of the modern sporting rifle, the Sightmark Core TX Riflescope Series has been designed for accuracy and reliability. Each scope in this tactical series has been carefully crafted to overcome the challenges shooters encounter in the field.
Sightmark Core TX riflescopes use fully multi-coated optics to provide optimal light transmission in a variety of conditions. Etched glass reticles are illuminated to deliver optimal shot placement and are durable enough to withstand hours of shooting.
The Core TX riflescopes feature exposed, lockable turrets which help maintain a consistent zero. Turrets are quick and easy to adjust to compensate for bullet drop and windage on the fly.
Red/Green illuminated reticle
Single-piece tube construction
Aircraft-grade aluminum with hard-anodized finish
Shockproof, fogproof, and waterproof
Lockable, exposed turrets
Second-focal plane reticle
Fully multi-coated optics, crisp edge-to-edge visibility
Scope rings and battery included
Windage and Elevation Adjustment
The Sightmark Core TX riflescopes are equipped with exposed, lockable windage and elevation turrets. Each scope has it’s MOA click value marked on the adjustment. For example, a MOA click means each click moves the point of impact .25″ at 100yards. 1 MOA of movement would require 4 clicks.
The Sightmark Core TX Riflescopes use an etched reticle. The reticle can be used without illumination and will appear black. The dial is marked with “G” for green or “R” for red followed by the brightness setting ranging from 0 (off) to 5. Setting 5 is best for bright, outdoor environments. Setting 1 is best for low light environments.
DCR Dual Caliber Reticle
This reticle is calibrated for .223 Rem. (55gr and 62gr) and .308 Win. (150gr and 155gr) and was designed for triple duty application: tactical, competition, and hunting. The design provides a fine .3 MOA central aiming crosshair at higher magnifications and holdovers for 300yd, 400yd, 500yd, 600yd and 700yd. The reticle was designed for a 100 yard zero. The calibers and grains ideal for this reticle shoot relatively flat, so the central aiming point of the reticle is used to shoot targets from 0 to 200 yards. For the most accurate precision at 200 yards, it is recommended to aim 3″ high on the target or 1.5 MOA.
1-4x24DCR 3-12x44DCR 4-16x44MR 8.5-25x50MR 1-4×24 A R-223
Reticle Dual Caliber Dual Caliber Marksman Marksman A R-223
Magnification 1-4x 3-12x 4-16x 8-25x 1-4x
Objective lens 24mm 44mm 44mm 50mm 24mm
Weight 17oz 20oz 24oz 29oz 16.2oz
Battery CR2032 CR2032 CR2032 CR2032 CR2032
About the Sightmark Company
Sightmark is a premium company for long gun scopes, optics, mounting solutions, and other add-ons used for guns like rifles and long guns. They innovate and make their products making the most of building materials which are resilient and long lasting. This includes the Sightmark Core TX 1-4x24DCR .223/.308 BDC Dual Caliber Riflescope by Sightmark. For more shooting products, visit their site.
Rifle scopes enable you to specifically align a rifle at various targets by aligning your eye with the target over a range. They accomplish this through zoom by using a set of lenses inside the scope. The scope’s alignment can be adjusted for consideration of various natural things like wind and elevation to make up for bullet drop.
The scope’s purpose is to understand exactly where the bullet will hit based on the sight picture you are seeing with the scope as you align the scope’s crosshair or reticle with the intended point of impact. Most modern-day rifle scopes have around 11 parts which are found inside and on the exterior of the optic. These optic pieces include the rifle scope’s body, lenses, modification dials, objective focus rings, and other parts. See all eleven parts of a rifle optical system.
About Glass Varieties
Rifle scopes can be either “first focal plane” or “second focal plane” type of scopes. Selecting 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) include the reticle in front of the magnification lens. These types of scopes are useful for:
- Quick acquisition, long distance types of shooting
- Shooting scenarios where calculations are very little
- Experienced shooters who understand their aim point “hold over” as well as “lead” relationships for their firearms
- Shooters who don’t mind the reticle is enlarged and occupies more visual eyesight space than a SFP reticle
Second Focal Plane Glass Info
Second focal plane optics (SFP) feature the reticle to the rear of the magnifying lens. This causes the reticle to remain at the exact same scale relative to the level of magnification being used. The final result is that the reticle dimensions shift based upon the magnification applied to shoot over greater ranges given that the markings present different increments which change with the magnification level. In the FFP illustration with the SFP glass, the 5x “zoom” one hundred yard tick would be 1/5th of the non “zoom” tick. These kinds of glass are beneficial for:
- Long distance forms of shooting where shooters have extra time to make ballistic computations
- Shooting where most shots occur within much shorter proximities and ranges
- Shooters who like a clearer optic sight picture without space used up by the bigger FFP reticle
The amount of scope magnification you need on your scope is based on the sort of shooting you wish to do. Practically every type of rifle glass provides some degree of magnification. The quantity of zoom a scope delivers is identified by the diameter, density, and curves of the lens glass within the rifle scope. The magnification level of the scope is the “power” of the scope. This implies what the shooter is checking out through the scope is magnified times the power element of what can typically be seen by human eyes.
Single Power Lens Optic Facts
A single power rifle optic or scope comes with a magnification number designator like 4×32. This implies the magnification power of the scope is 4x power and the objective lens is 32mm. The zoom of this type of scope can not change since it is a fixed power scope.
Adjustable Power Lens Rifle Scopes
Variable power rifle scopes have adjustable power. These types of scopes will note the zoom level in a configuration like 2-10×32. These numbers suggest the magnification of the scope can be changed in between 2x and 10x power. This always involves the power levels in-between 2 and 10. The power manipulation is accomplished by applying the power ring component of the scope near the rear of the scope by the eye bell.
Optic Power and Ranges
Here are some recommended scope power levels and the distances where they may be efficiently used. Highly magnified rifle scope glass will not be as useful as lower magnification level rifle scope glass given that too much zoom can be a negative aspect depending on your shooting distance. The exact same concept applies to extended ranges where the shooter needs sufficient power to see exactly where to best aim the rifle at the target.
Rifle Scope Lens Finishing
All contemporary rifle optic lenses are coated. There are various types and qualities of coverings. Lens covering is an important aspect of a rifle’s setup when thinking about high-end rifle optics and targeting equipment. The glass lenses are among the most essential parts of the optic due to the fact that they are what your eye sees through while sighting a rifle in on the target. The finishing on the lenses shields the lens surface and even helps with anti glare capabilities from excess natural light and color exposure.
HD Versus ED Lens Coatings
Some rifle glass suppliers additionally use “HD” or high-definition glass finishes that take advantage of various processes, rare earth compounds, polarizations, and components to enhance various colors and viewable definition through the lens. This HD covering is normally used with more costly, high density lens glass which drops light’s chance to refract through the lens glass. Some scope suppliers use “HD” to describe “ED” suggesting extra-low dispersion glass. ED handles how colors are presented on the chromatic spectrum and the chromatic aberration or difference which is also called color distortion or fringing. Chromatic aberration is often visible over items with hard shapes as light hits the object from specific angles.
Glass Lens Single Covering Versus Multi-Coating
Various optic lenses can also have various finishings used to them. All lenses normally have at least some type of treatment or coating used to them before they are used in a rifle scope or optic.
Single coated lenses have a treatment applied to them which is usually a protective and improving multi-purpose treatment. This lens treatment can shield the lens from scratches while decreasing glare and other less helpful things experienced in the shooting environment while sighting in with the optic. The quality of a single covered lens depends upon the scope designer and how much you spent paying for it. Both the make and cost are indicators of the lens quality.
Some scope makers also make it a point to specify if their optic lenses are layered or “multi” coated. This suggests the lens has had multiple treatments applied to the surfaces of the glass. If a lens gets numerous treatments, it can prove that a company is taking numerous actions to combat various environmental elements like an anti-glare finishing, a scratch resistant anti-abrasion covering, followed by a hydrophilic finishing. This additionally doesn’t necessarily mean the multi-coated lens is better than a single layered lens. Being “much better” depends upon the maker’s lens treatment innovation and the quality of components used in constructing the rifle optic.
Rifle Glass Lens Hydrophobic Finishing
Water on a scope’s lens doesn’t assist with preserving a clear sight picture through a scope at all. Numerous top of the line or premium scope makers will coat their lenses with a hydrophobic or hydrophilic finish. The Steiner Optics Nano-Protection is a good example of this kind of treatment. It deals with the surface area of the Steiner glass lens so the H2O particles can not bind to it or develop surface tension. The outcome is that the water beads move off of the scope to keep a clear, water free sight picture.
Alternatives for Mounting Rifle Scopes on Firearms
Installing approaches for scopes come in a few options. There are the basic scope rings which are individually installed to the optic and one-piece mounts which cradle the scope. These different types of mounts also usually can be found in quick release versions which use manual levers which allow rifle operators to rapidly mount and remove the optics.
Hex Key Glass Ring Mounts
Standard, clamp style mounting scope rings use hex head screws to mount to the flattop style Picatinny scope installation rails on rifles. These types of scope mounts use a couple of different rings to support the optic, and are often made from 7075 T6 billet aluminum which is developed for long distance accuracy shooting. This type of scope mount is perfect for rifles which need a long lasting, rock solid mount which will not move no matter how much the scope is moved or abuse the rifle takes.
Rifle Scope Mounting Solutions with Quick-Release Cantilever Rings
These types of quick-release rifle scope mounts can be used to rapidly detach a scope and attach it to a different rifle. Multiple scopes can also be swapped out if they all use a compatible style mount. These types of mounts come in handy for rifle platforms which are transferred a lot, to swap out the optic from the rifle for protecting the scope, or for scopes which are used in between multiple rifles.
Sealing and Gas Purging for Glass Tubes
Moisture inside your rifle scope can destroy a day of shooting and your pricey optic by triggering fogging and producing residue inside of the scope tube. Many scopes avoid wetness from getting in the scope tube with a system of sealing O-rings which are waterproof.
About Scope Tube Gas Purging
Another element of preventing the buildup of wetness inside of the rifle scope tube is filling the tube with a gas like nitrogen. Considering that this area is currently taken up by the gas, the optic is less altered by temperature level shifts and pressure variations from the outdoor environment which could potentially enable water vapor to permeate in around the seals to fill the vacuum which would otherwise be there. These are good qualities of a good rifle scope to seek out.