The .308 Winchester, a cartridge celebrated for its versatility and consistent performance, holds a special place in the hearts of hunters and shooters alike. From bringing down game in the dense forests to hammering steel at extended distances, the .308 delivers remarkable accuracy and power. However, the true potential of this cartridge can only be unlocked with the right optical companion. A high-quality scope isn’t just an accessory; it’s an investment that transforms your rifle into a precision instrument, drastically improving your ability to make accurate shots, especially at longer ranges. This guide will delve into the world of scopes best suited for .308 rifles, exploring key features, highlighting top brands, and offering recommendations for various shooting scenarios to help you select the perfect optic for your needs.
Understanding the Essentials of a .308 Scope
Choosing the right scope can feel daunting, especially with the vast array of options available. Understanding the core characteristics of a scope is crucial for making an informed decision. Let’s break down the critical elements that influence its performance and your shooting experience.
Magnification’s Role in Precision
The magnification of a scope dictates how much closer your target appears. A scope with a variable magnification, like a 3-9×40, can zoom in on the target from three times to nine times the actual distance. The first number (3) represents the minimum magnification, and the second number (9) represents the maximum magnification. The final number (40) indicates the objective lens diameter in millimeters, which we’ll discuss shortly.
For hunting, lower magnification ranges like 2-7x or 3-9x are often preferred as they offer a wider field of view, enabling you to quickly acquire targets at closer ranges and in forested environments. However, scopes with higher magnification ranges, such as 4-16x or even up to 5-25x, are better suited for target shooting and long-range applications. These higher magnifications allow you to clearly see your target, allowing for more precise shot placement at extended distances. Keep in mind that higher magnifications can also reduce the field of view, which is the width of the area you can see through the scope. Finding the right balance between magnification and field of view is vital for your specific shooting goals.
Objective Lens Dimensions and Light Gathering
The objective lens, located at the front of the scope, is responsible for gathering light. The size of the objective lens, measured in millimeters, directly impacts the brightness of the image you see. A larger objective lens, like a 50mm or 56mm, gathers more light than a smaller one, like a 40mm. This is particularly beneficial in low-light conditions, such as dawn or dusk, when hunting, or when shooting in shaded areas. The bigger the objective lens, the brighter and clearer the image.
However, a larger objective lens can also increase the overall size and weight of the scope. This can affect the balance of your rifle and may be a factor for hunters who prefer a lighter setup. Consider the intended use of your scope when choosing the objective lens diameter. For hunting, a 40mm or 44mm objective lens usually provides a good balance between light gathering and manageability. For target shooting or long-range scenarios, a 50mm or larger objective lens is often preferred for maximum image clarity and brightness.
Choosing the Right Reticle Style
The reticle, or crosshair, is the aiming point within the scope. There are several reticle types, each with its advantages for various shooting applications.
- Duplex Reticles: These reticles are the simplest, featuring thick outer posts that taper to a thin crosshair in the center. They are excellent for quick target acquisition, making them a popular choice for hunting.
- Mil-Dot Reticles: These reticles have small dots or dashes placed along the crosshairs, which are used for range estimation and holdover. The spaces between the dots represent milliradians (mrads), which can be used to calculate the distance to your target and adjust your aim accordingly. These are commonly used for target shooting and tactical applications.
- Bullet Drop Compensation (BDC) Reticles: BDC reticles have a series of holdover points below the main crosshair, specifically calibrated for the ballistics of the .308 cartridge and a particular bullet weight and muzzle velocity. These holdover points enable you to compensate for bullet drop at various distances, making them popular for hunting and long-range shooting. Note that BDC reticles are often calibrated for a specific magnification setting on variable power scopes.
- Minute of Angle (MOA) Reticles: These reticles utilize MOA-based hash marks. One MOA is approximately one inch at 100 yards. These reticles are used for range estimation and holdover, similar to Mil-Dot reticles.
Consider the typical distances you’ll be shooting and the level of precision you require when selecting your reticle. For hunting, a duplex or BDC reticle may suffice. For target shooting or long-range shooting, a Mil-Dot or MOA reticle offers greater precision and allows for more complex adjustments.
Precision Through Adjustment Turrets
Adjustment turrets are critical for zeroing your scope (setting the point of impact to match your point of aim) and making adjustments for windage and elevation. The windage turret adjusts for horizontal bullet drift caused by wind, while the elevation turret adjusts for bullet drop due to gravity.
Most scopes use MOA (Minute of Angle) or MRAD (Milliradian) adjustments. One MOA corresponds to approximately one inch at 100 yards. One MRAD corresponds to approximately 3.6 inches at 100 yards. The clicks on the turrets represent the amount of adjustment per click (e.g., 1/4 MOA per click or 0.1 MRAD per click). The most significant benefit of having accurate turret adjustments is the ability to adjust for wind drift and bullet drop when shooting at varying distances.
Look for turrets with positive, repeatable clicks; this ensures that your adjustments are accurate and that the scope will maintain its zero. Target turrets, often found on scopes for target shooting, are typically taller and more easily adjusted.
Parallax Awareness for Accuracy
Parallax is an optical phenomenon that causes the reticle to appear to move relative to the target when the shooter’s eye is not perfectly centered behind the scope. This can introduce significant errors in your shot placement, especially at longer ranges. Scopes with parallax adjustment allow you to eliminate this issue.
The most common method of parallax adjustment is an adjustable objective (AO), where you rotate a ring on the objective lens to focus the image and remove parallax. Another method uses a side focus knob. The range of distance settings is usually indicated on the adjustable objective or the side focus knob. It’s essential to correctly adjust for parallax at the distance you’re shooting to achieve the highest level of accuracy.
Construction and Durability: Standing up to the Elements
The environment is unforgiving, and your scope needs to be able to withstand the rigors of outdoor use. Look for scopes constructed from high-quality materials, such as aircraft-grade aluminum. The scope should be waterproof, fog proof, and shockproof. Waterproofing ensures that water won’t penetrate the scope, while fog proofing prevents internal fogging due to changes in temperature or humidity. Shockproof construction ensures that the scope can withstand the recoil of the .308 without damage. These qualities will guarantee that the scope will consistently perform at its best.
Top Scope Recommendations Based on Purpose
Now, let’s dive into some specific scope recommendations based on various shooting applications. These are popular and well-regarded scopes within their respective niches.
Optics for Hunting Excellence
For hunting, you need a scope that offers quick target acquisition, durability, and good light transmission, especially in low-light conditions. Consider scopes in the 2-7x or 3-9x magnification range, with objective lens diameters of 40mm or smaller.
Example: The **Leupold VX-Freedom** series provides excellent clarity, ruggedness, and a lifetime guarantee. They are well-regarded for their clear glass and reliable performance in the field. They offer a range of reticle options, including the popular Duplex reticle.
Scope Selection for Accurate Target Shooting
Target shooters prioritize precise adjustments, high magnification, and clear optics. Look for scopes with a magnification range of 6-24x or higher, with objective lens diameters of 50mm or larger, and fine-tuned adjustments.
Example: The **Vortex Viper** series is a great example of a scope that delivers a solid combination of performance, features, and value. They feature clear optics, precise adjustments, and a variety of reticle options.
Scoping Choices for Long-Range Precision
Long-range shooting demands high magnification, precise adjustments, and reticles designed for bullet drop compensation. Scopes with a magnification range of 5-25x or higher, BDC or Mil-based reticles, and adjustable turrets are ideal for this application.
Example: The **Nightforce ATACR** series are known for their superb optics, rugged construction, and precise adjustments. They’re popular choices among serious long-range shooters. These scopes also feature illuminated reticles for low-light conditions.
Smart Choices for Those on a Budget
Not everyone has the budget for high-end scopes, but that doesn’t mean you can’t get a great scope. Budget-friendly options can still deliver excellent performance, especially for recreational shooting or hunting at moderate ranges.
Example: The **Primary Arms** scopes offer an impressive range of features and performance for the price, making them a favorite among budget-conscious shooters.
Factors to Weigh During Your Decision
Choosing the right scope for your .308 involves considering several factors that are unique to your circumstances.
Shooting Application at Hand
The primary use case of the rifle determines the most suitable features for your scope. Hunting scopes prioritize light transmission and target acquisition at close to moderate distances. Target shooting scopes demand fine adjustments, high magnification and clarity. Long-range shooting requires the highest magnifications, precise adjustments, and reticles designed for holdover calculations.
Budget Considerations
Scopes range widely in price. Determine your budget before you begin your search. The best scope is one that meets your needs without exceeding your financial capacity.
Compatibility with your Rifle
Scopes are mounted with scope mounts. Ensure that the scope you select is compatible with your rifle and your desired mounting system. Different rifles and mounting systems can influence the scope’s placement and eye relief.
Eye Relief Considerations
Eye relief is the distance between your eye and the ocular lens of the scope. This is important, since .308 rifles have significant recoil. Make sure your chosen scope provides sufficient eye relief to protect you from the recoil.
Mounting, Zeroing, and Maintenance for Optimum Results
Once you’ve selected your scope, proper mounting, zeroing, and maintenance are crucial for optimal performance.
Mounting Your Optics Securely
Mounting your scope correctly is fundamental. Different mounting systems are available; choose one that’s compatible with your rifle and your scope’s tube diameter. Use a torque wrench to tighten the screws to the manufacturer’s specifications.
Zeroing for Peak Performance
To zero your scope, you must first mount the scope securely and then follow these steps. Start by bore-sighting the rifle, which involves looking through the barrel to align the crosshairs with the target. Then, at your chosen zeroing distance (100 yards is typical), fire a three-shot group. Adjust the windage and elevation turrets to bring your point of impact to your point of aim. Repeat this process until your shots consistently hit your intended target.
Scope Care and Sustained Performance
Regular cleaning will maintain the clarity of the lens. Clean the lenses regularly using a lens cleaning cloth and the appropriate cleaning solution. Store the scope in a dry, protected environment to prevent damage.
Conclusion: Precision, Power, and the Right Scope
The .308 Winchester is a versatile and powerful cartridge, capable of remarkable accuracy. The right scope is the key to unlocking the full potential of your .308 rifle. By understanding the features discussed in this guide and selecting the right scope for your needs, you’ll transform your rifle into a precision instrument, enhancing your accuracy and allowing you to experience the true capabilities of this remarkable cartridge. Consider the specific hunting scenarios, target shooting objectives, or long-range ambitions that drive you. Be patient, research your options, and choose the scope that best aligns with your goals. Then, get out there and enjoy the precision and power that the .308 and your new scope combination can provide.
