Understanding the Language of Angle
Minute of Angle
The thrill of a perfectly placed shot at extreme distances. The satisfaction of connecting with a target far beyond the ordinary range. For those who appreciate precision, especially in the realm of rifle shooting, the pursuit of extended effective ranges is a constant endeavor. One critical piece of equipment that significantly aids in this pursuit is the scope base, specifically the 20 MOA scope base. This isn’t just another accessory; it’s a crucial component for maximizing the potential of both your rifle and your optic. Let’s delve into why understanding and utilizing a 20 MOA scope base can transform your long-range shooting experience.
Before we dive deep into the specifics of a 20 MOA scope base, it’s essential to grasp the fundamental concept of Minute of Angle, or MOA. Imagine a circle, a complete rotation encompassing three hundred and sixty degrees. Now, divide that circle into smaller units. MOA is one such unit, specifically, one-sixtieth of a degree.
To put it simply, at a distance of one hundred yards, one MOA translates to approximately one inch. So, if your group size (the spread of your shots) at one hundred yards measures one inch, you are achieving one MOA accuracy. At two hundred yards, one MOA is equal to approximately two inches, and so on, scaling up proportionally with distance. The key takeaway is that MOA is an angular measurement, and this angular measurement allows us to quantify the amount of adjustment needed to correct for bullet drop or wind deflection at any given distance.
Understanding this concept of MOA is the very foundation of long-range shooting. It’s the common language shooters use to describe the degree of accuracy their rifle setup is producing and the amount of adjustment they need to account for external factors. The ability to think and communicate in MOA allows for precise and predictable adjustments to your scope, ensuring accurate shots at varying distances. In short, to be a competent marksman, you must be comfortable with MOA.
The Unsung Hero: What is a Scope Base?
Purpose and Function
At the heart of a successful long-range setup lies the scope base, often overshadowed by the scope itself. However, this unassuming piece of hardware plays a pivotal role. The primary function of a scope base is straightforward: it provides a secure platform for attaching your scope to your rifle receiver. Without a stable and reliable base, your scope won’t hold zero, and any attempts at accurate shooting will be futile.
Types of Scope Bases
Scope bases come in a variety of designs, which mainly depend on the mounting system your rifle utilizes. Some rifles are designed to accept Picatinny rails, offering a versatile mounting system that’s standard across military and tactical platforms. Others utilize the Weaver standard, another popular mounting system, known for its simplicity and robustness. Yet other rifles are designed with proprietary mounting systems or require a dedicated base specific to that rifle model. The correct scope base will fit the receiver on your rifle.
Materials and Considerations
The materials used in scope base construction also impact performance. High-quality bases are typically constructed from durable materials, such as aircraft-grade aluminum or hardened steel. Aluminum bases are lightweight and resist corrosion, making them a popular choice. Steel bases, on the other hand, offer superior strength and durability, which can be especially beneficial in high-recoil scenarios. The choice of material often depends on the intended application and the shooter’s priorities.
The Extra Mile: Unveiling the Benefits of a 20 MOA Scope Base
The Angle Advantage
Now, let’s focus on the star of our show: the 20 MOA scope base. What sets this type of base apart is its built-in inclination, or elevation. Unlike a standard, flat scope base, a 20 MOA scope base is slightly angled upward. This built-in slope provides an additional measure of vertical adjustment. It effectively “pre-tilts” the scope, allowing you to dial in more elevation on your scope to compensate for bullet drop at longer distances.
How it Works
So, how does this work in practice? The 20 MOA scope base offsets the zero of your scope, pushing the point of impact lower on your target. This offset allows you to use more of your scope’s internal adjustment range to compensate for the bullet’s downward trajectory. When you zero your rifle, you set the point of impact. With the 20 MOA scope base, you are essentially starting from a slightly elevated position, allowing for significantly more upward adjustment available for those extreme distance shots.
Benefits of a 20 MOA Scope Base
The advantages are undeniable:
- Combatting Bullet Drop: At long ranges, gravity takes a significant toll on a bullet’s trajectory. The bullet drops considerably over distance. The 20 MOA scope base provides the extra elevation adjustment needed to “hold over” and hit your target accurately.
- Expanding Scope Reach: By leveraging the built-in elevation, you can effectively extend the usable range of your scope. The design helps ensure your reticle remains within the scope’s adjustment range, allowing you to engage targets at distances that might otherwise be impossible.
- Preserving Adjustment Range: A 20 MOA scope base keeps you from maxing out your scope’s elevation adjustments. You will have much more range of available adjustment to accommodate changing environmental factors and various target distances.
When is the 20 MOA Advantage Most Valuable?
Caliber Considerations
While a 20 MOA scope base can be beneficial in many situations, it’s particularly advantageous under specific circumstances.
First, the caliber of your rifle plays a crucial role. Shooters using higher-velocity cartridges, like those commonly used in long-range precision shooting, will often find the 20 MOA scope base to be essential. The flatter trajectory of these rounds means you can often reach out farther.
Scope and Range Considerations
Second, consider your scope’s internal adjustment range. Scopes vary in their available adjustment range, so, even with a 20 MOA scope base, you’ll need adequate internal travel to account for the distance. Ensure your scope has enough adjustment range to work in concert with the base.
Third, the distances you intend to shoot at are critical. The longer your target range, the more elevation adjustment will be necessary to compensate for bullet drop. If your goal is consistent hits at distances beyond five hundred yards, a 20 MOA scope base should be strongly considered.
Environmental Factors
Finally, environmental elements should always factor into the equation. Wind, temperature, and altitude can significantly impact bullet trajectory. A 20 MOA scope base will give you more capacity for adjusting for these variables.
Installation: Setting the Foundation for Accuracy
Step-by-Step Guide
While the installation process can vary slightly depending on the specific rifle and scope base, the general principles remain consistent. Safety is paramount, so handle your rifle with care, and always ensure it is unloaded before commencing work.
- Remove the Existing Base: If you are replacing an existing base, carefully remove the screws and the old base.
- Clean the Mounting Surfaces: Clean the receiver of your rifle and the underside of the new 20 MOA scope base with a solvent like isopropyl alcohol. This helps ensure a secure fit.
- Apply Thread Locker: Apply a small amount of thread locker (Loctite is a common brand) to the threads of the screws. This prevents them from loosening due to recoil.
- Secure the Base: Position the 20 MOA scope base on the receiver and insert the screws.
- Torque the Screws: Use a torque wrench to tighten the screws to the manufacturer’s recommended specifications. Over-tightening can damage your rifle or scope, while under-tightening can cause the base to come loose.
- Level the Scope: Once the base is installed, level your scope to ensure proper alignment with the rifle.
- Zero the Scope: Finally, zero your scope after installing the base and securely mounting the scope rings. It’s important to verify the zero at a known distance and make any necessary adjustments.
Always remember to consult the manufacturer’s instructions for both the 20 MOA scope base and your rifle.
Making an Informed Choice: Selecting a Quality Scope Base
Material Matters
Choosing a 20 MOA scope base involves several considerations.
Material matters. Aircraft-grade aluminum is a popular choice due to its light weight and corrosion resistance. Steel bases are also a good option for their added strength and durability, particularly for high-recoil calibers.
Mounting Standards
Ensure the mounting standard of the base is compatible with your rifle. Whether it is Picatinny or Weaver, the base must fit securely to provide the correct mounting platform.
Quality and Brand
Quality is of the essence. Look for bases from reputable manufacturers with a proven track record for producing high-quality components. A quality base is an investment in the accuracy and reliability of your rifle.
Price Range
The price range of 20 MOA scope bases varies depending on the material, brand, and features. Shop around, compare features and pricing, and prioritize the quality and compatibility with your rifle and scope.
Troubleshooting: Addressing Common Issues
Common Problems
Even with the best equipment, problems can arise. Let’s address some of the issues you might encounter:
- Scope Running Out of Elevation: This is a common issue. It can mean that you do not have enough adjustment in your scope or your chosen range requires the scope to exceed its internal capability.
- Loose Screws: Ensure that all screws are properly tightened. Using thread locker is essential to prevent loosening. Regularly check the screws.
- Alignment Issues: A poorly aligned scope can lead to all sorts of issues. Double-check the levelness of both the base and the scope, and ensure they are correctly mounted.
Conclusion: The Power of Precision
In the realm of long-range shooting, every component plays a role, but the 20 MOA scope base stands out as a critical element for precision. By providing additional elevation adjustment, a 20 MOA scope base unlocks the full potential of your scope, allowing you to compensate for bullet drop and extend your effective range. Whether you’re a seasoned marksman or just beginning your journey into long-range shooting, understanding the advantages of a 20 MOA scope base is essential.
The benefits—from greater accuracy at distance to the ability to maximize your scope’s capabilities—make it a worthwhile upgrade for many shooters. Consider a 20 MOA scope base for your rifle, and experience the difference.
Next Steps: Explore and Learn
Further Research
Ready to enhance your long-range shooting? Take these steps:
- Research and compare 20 MOA scope bases from different manufacturers.
- Consider the specific requirements of your rifle, scope, and shooting style.
- Consult with experienced shooters or gunsmiths to gather additional insights.
- Review online forums, and read product reviews to see what others are using and the experiences they’ve had.
- Practice consistently, and always prioritize safety.
By making the right choices and understanding the fundamentals of your equipment, you’ll be well on your way to improved accuracy and extending your range. Good shooting!
