Description
Rifle Scope Product Details
Gamo 270-39X40AOWRTB Sweet 270 AO 3X-9X 40mm Rifle Scope, Multi
Designed for .270 caliber rifles, the BSA 3-9x sweet .270 AO riflescope offers users many handy features like a 3-9x zooming range, durable construction, fully coated lenses, adjustable objective Parallax Correction, and a second Focal Plane 30/30 reticle. This scope SHIPS ready to be mounted using the included 1″ dovetail rings and offers 100-, 130-, and 150-grain turrets for different ammunition. Also noteworthy is its climate Xtreme protection that ensures a waterproof, fogproof, and impact-resistant performance. To help you adjust the trajectories, it also offers windage and elevation with 1/4 MOA clicks. Features: – 30/30 reticle, 2nd Focal Plane – 1″ diameter maintube – windage/elevation with 1/4 MOA clicks – 100-, 130-, and 150-grain turrets – aluminum alloy housing – green full coatings – fogproof/waterproof/impact resistant – adjustable objective Parallax – for .270 caliber rifles – two dovetail rings included includes: – BSA optics 3-9x sweet .270 AO riflescope (30/30 reticle, matte black) – 2 x dovetail rings specifications: – color/finish: matte black – magnification: 3-9x – objective lens diameter: 40mm – maintube diameter: 1″ – reticle: 30/30 reticle, 2nd Focal Plane – field of view: 34.2-11.5′ at 100 Yd/11.4-3.8 M At100 M- Parallax Correction: 7.5 Yd/6.9 M to Infinity – eye relief: 4.0″ – exit Pupil diameter: 13.3-4.4 mm – impact point Correction: 1/4 MOA – windage/elevation adjustment: yes – weatherproofing: waterproof and fogproof – dimensions: 12.7″ – weight: 22.3 oz.
Rifle Scope Product Features
40mm Adjustable Objective
Water-Proof, Shock-Proof, & Fog-Proof
Size: 3X-9X
1 inch diameter maintube
BSA Optics SWEET .270 AO 3-9×40
Specifically designed for the .270 caliber cartridge
The BSA Sweet .270 AO Rifle Scope is specifically designed for the .270 caliber cartridge. Complete with 3 ballistically calibrated turrets for 100gr, 130gr, and 150 gr cartridges, the Sweet .270 AO also features an adjustable objective, fully coated lenses, 30/30 reticle and 2 pc. weaver rings Matte black finish. Waterproof, shockproof and fogproof.
Magnification low: 3; Magnification high: 9
Objective lens diameter: 40 mm
Adjustment MOA: 1/4
Lens Material: Glass; Lens: Fully Coated
W/E Range: 35; Eye Relief: 3 inches
FOV LOW @ 100′ (ft): 34.2; FOV HIGH @ 100′ (ft): 11.5
PARALLAX SETTING (yds): 7.5 to Inf.
Reticle: 30/30
Shockproof, Fogproof, Waterproof
Tube diameter: 1″, one piece; Aluminum Construction
Specification
Magnification low: 3; Magnification high: 9; Objective lens diameter: 40 mm
30/30 Duplex Reticle
1 piece aluminum construction, 1 inch tube
Glass lens material, fully coated
Adjustable Objective
Shockproof, Fogproof, Waterproof
21.80 oz weight; 12.2 in length.
Two Piece weaver style mounts included
270-39X40AOWRTB BSA Optics SWEET .270 AO 3-9×40
Calibrated turrets for 100gr, 130gr, and 150 gr cartridges
BSA Optics SWEET .270 AO 3-9×40 BSA Optics SWEET .270 AO 4-12×40
Magnification 3-9 4-12
Objective Diameter 40 mm 40 mm
Adjustable Objective
Lenses Fully Coated Glass Fully Coated Glass
One Piece Aluminum Construction
Shockproof, Fogproof, Waterproof
2 piece Weaver Style Mounts Included
30/30 Duplex Reticle
Length 12.20 in 12.9 in
Weight 21.80 oz 22.30 oz
About the Gamo Scope Maker
Gamo is a premium company for long gun scopes, optics, mounting solutions, and other components used for firearms like rifles and long guns. They design and build their mounts and related products by applying materials which are long lasting and durable. This includes the Gamo 270-39X40AOWRTB Sweet 270 AO 3X-9X 40mm Rifle Scope, Multi by Gamo. For additional shooting items, visit their website.
What You Need to Know About Scopes
Rifle scopes allow you to specifically aim a rifle at different targets by lining up your eye with the target at range. They accomplish this through zoom by using a set of lenses within the scope. The scope’s positioning can be adapted to account for numerous ecological elements like wind speed and elevation decreases to make up for bullet drop.
The scope’s purpose is to help shooters understand exactly where the bullet will land based upon the sight picture you are seeing using the scope as you align the scope’s crosshair or reticle with the intended point of impact. Most modern rifle optics have about 11 parts which are arranged internally and on the exterior of the optic. These scope parts consist of the rifle scope’s body, lenses, windage dials, objective focus rings, and other components. See all eleven parts of a rifle optical system.
The Styles of Rifle Scopes
Rifle scopes can be either “first focal plane” or “second focal plane” style of scopes. The sort of focal plane a scope has decides where the reticle or crosshair lies in connection with the optic’s magnifying adjustments. It literally means the reticle is located behind or before the magnifying lens of the scope. Selecting the most effective style of rifle glass depends upon what kind of hunting or shooting you anticipate undertaking.
First Focal Plane Scopes
First focal plane optics (FFP) come with the reticle ahead of the magnifying lens. This induces the reticle to increase in size based on the level of zoom being used. The outcome is that the reticle measurements are the same at the magnified range as they are at the non magnified distance. As an example, one tick on a mil-dot reticle at one hundred yards without having “zoom” is still the very same tick at 100 yards using 5x “zoom”. These types of scopes work for:
- Quick acquisition, long distance types of shooting
- Shooting situations where estimations are minor
- Experienced shooters who have an idea for their aim point “hold over” and “lead” equations for their weapon
- Shooters who don’t mind the reticle is bigger and takes up more visual eyesight space than a SFP reticle
Second Focal Plane Glass
Second focal plane scopes (SFP) feature the reticle to the rear of the magnification lens. In the FFP example with the SFP scope, the 5x “zoom” one hundred yard tick measurement would be 1/5th of the non “zoom” tick reticle measurement.
- Long distance types of shooting where shooters have increased time to make ballistic calculations
- Shooting where most shots happen within much shorter distances and ranges
- Shooters who choose a clearer optic picture with less space taken up by the larger sized FFP reticle
Zoom for Glass
The extent of scope magnification you need is based on the style of shooting you choose to do. Practically every style of rifle scope offers some amount of zoom. The volume of zoom a scope supplies is identified by the diameter, thickness, and curves of the lens glass within the rifle scope. The magnification of the scope is the “power” of the scope. This denotes what the shooter is checking out through the scope is amplified times the power factor of what can generally be seen by human eyes.
Fixed Power Lens Rifle Scope Details
A single power rifle scope or optic uses a zoom number designator like 4×32. This means the zoom power of the scope is 4x power while the objective lens is 32mm. The zoom of this type of optic can not change considering that it is a fixed power optic.
Info on Variable Power Lens Rifle Optics
Variable power rifle scopes can be changed between magnification levels. These types of scopes will list the zoom degree in a configuration such as 2-10×32. These numbers imply the magnification of the scope can be set between 2x and 10x power. This also incorporates the powers in-between 2 and 10. The power adjustment is accomplished by applying the power ring component of the scope near the rear of the scope by the eye bell piece.
The Power Level and Range Correlation of Scopes
Here are some suggested scope power settings and the distances where they could be successfully used. Always remember that high magnification optics will not be as effective as lower magnification level glass due to the fact that increased zoom can be a negative thing in certain situations. The same concept goes for longer ranges where the shooter needs increased power to see where to best aim the rifle at the target.
Rifle Optic Lens Finishing
All modern-day rifle glass lenses are coated. Lens finish is a vital element of a shooting system when looking into high end rifle optics and scope equipment.
Details on Scope Lens Coatings – HD Versus ED
Some scope producers also use “HD” or high-definition lens coverings which use different processes, chemicals, polarizations, and elements to draw out a wide range of colors and viewable quality through the lens. Some scope makers use “HD” to refer to “ED” indicating extra-low dispersion glass.
Single Finish Versus Multi-Coating for Rifle Optics
Various scope lenses can also have various finishings applied to them. All lenses generally have at least some kind of treatment or covering applied to them before being used in a rifle scope or optic. Since the lens isn’t simply a raw piece of glass, they require performance enhancing coatings. It becomes part of the carefully tuned optic. It needs to have a finish put on it so that it will be efficiently usable in lots of kinds of environments, degrees of sunlight (full light VS shaded), and other shooting conditions.
Single coated lenses have a treatment applied to them which is normally a protective and enhancing multi-purpose treatment. This lens treatment can safeguard the lens from scratches while decreasing glare and other less useful things experienced in the shooting environment while sighting in with the scope. The quality of a single coated lens depends on the scope manufacturer and how much money you spent on it. Both are indicators of the lens quality.
Some scope manufacturers also make it a point to specify if their optic lenses are covered or “multi” covered. This implies the lens has multiple treatments applied to the surfaces. If a lens receives numerous treatments, it can show that a company is taking several actions to combat various environmental elements like an anti-glare finishing, a scratch resistant anti-abrasion finish, followed by a hydrophilic finish. This additionally doesn’t necessarily mean the multi-coated lens will perform much better than a single covered lens. Being “better” hinges on the maker’s lens treatment techniques and the quality of products used in building the rifle optic.
Rifle Optic Lens Hydrophobic Finish
Water on a lens does not help with preserving a clear sight picture through a scope at all. Many top of the line and high-end optic companies will coat their lenses with a hydrophilic or hydrophobic coating.
Optic Installing Options
Mounting approaches for scopes come in a few options. There are the standard scope rings which are separately mounted to the optic and one-piece mounts which cradle the scope. These different kinds of mounts also usually are made in quick release versions which use manual levers which allow rifle operators to quickly install and remove the glass.
Hex Key Rifle Scope Rings
Basic, clamp-on design mounting scope rings use hex head screws to mount to the flattop design Picatinny scope mount rails on the tops of rifles. These styles of scope mounts use double separate rings to support the optic, and are made from 7075 T6 billet aluminum or similar materials which are made for far away precision shooting. This type of scope mount is exceptional for rifle systems which need a long lasting, hard use mount which will not change regardless of how much the scope is moved or jarring the rifle takes. These are the type of mounts you want for a dedicated optics system on a long distance scouting or sniper competition rifle which will rarely need to be changed or recalibrated. Blue 242 Loctite threadlocker can also be used on the scope mount’s screws to protect against the hex screw threads from wiggling out after they are mounted safely in position. An example of these mounting rings are the 30mm style made by the Vortex Optics company. The set normally costs around $200 USD
Optic Mounting Solutions with Quick-Release Cantilever Rings
These kinds of quick-release rifle scope mounts can be used to rapidly attach and take off a scope from a rifle. If they all use a comparable design mount, multiple scopes can also be swapped in the field. The quick detach design is CNC machined from anodized 6061 T6 aluminum and the mounting levers fasten tightly to a flat top design Picatinny rail. This permits the scope to be sighted in while on the rifle, removed from the rifle, and remounted while retaining the original sighting settings. These kinds of mounts come in beneficial for rifles which are hauled around a lot, to take off the scope from the rifle for protection, or for aiming systems which are adopted between a number of rifles. An example of this mount style is the 30mm mount designed by the Vortex Optics brand. It normally costs around $250 USD
Glass Tube Sealing and Gas Purging
Wetness inside your rifle optic can destroy a day of shooting and your costly optic by bringing about fogging and developing residue inside of the scope tube. Many scopes prevent moisture from entering the scope tube with a system of sealing O-rings which are waterproof.
Rifle Scope Gas Purging
Another component of preventing the buildup of wetness inside of the rifle scope tube is filling the tube with a gas like nitrogen. Because this area is currently occupied by the gas, the glass is less influenced by temp changes and pressure variations from the outdoor environment which may possibly permit water vapor to leak in around the seals to fill the vacuum which would otherwise exist. These are good qualities of a good rifle scope to seek out.
