Finding the right scope mount can be crucial for accuracy and ease of use. One common mounting solution involves adapting a dovetail rail to a Picatinny rail, particularly when dealing with a 20 MOA (Minutes of Angle) offset. This guide will explore the 20 MOA dovetail to Picatinny adapter, its applications, benefits, and things to consider when choosing one.
Understanding the Need for a 20 MOA Dovetail to Picatinny Adapter
Many rifles and scopes utilize different mounting systems. Rifles often feature dovetail rails, while scopes frequently use Picatinny rails (also known as MIL-STD-1913). A 20 MOA dovetail to Picatinny adapter bridges this gap, allowing for a secure and reliable mounting solution. The 20 MOA offset is particularly useful for long-range shooting.
What is a 20 MOA Offset?
A 20 MOA offset refers to a 20-minute angle of elevation built into the adapter. This essentially elevates the scope, allowing for a greater adjustment range without reaching the limits of the scope's elevation turret. This is particularly beneficial for long-range shooting where significant elevation adjustments are needed to compensate for bullet drop at extended distances. Without this offset, shooters might run out of adjustment before reaching their target's zeroing point.
Why Use a 20 MOA Adapter?
- Increased Elevation Adjustment: The primary advantage is the added elevation adjustment. This prevents the shooter from maxing out their scope's adjustments at longer ranges.
- Simplified Zeroing: By incorporating the offset, the initial zeroing process is often simplified. The scope is already slightly elevated, reducing the initial amount of upward adjustment needed.
- Versatility: The adapter provides compatibility between different mounting systems, allowing you to use your preferred scope on your rifle, regardless of their rail types.
Choosing the Right 20 MOA Dovetail to Picatinny Adapter
Several factors should be considered when selecting a 20 MOA dovetail to Picatinny adapter:
1. Material and Construction
Adapters are typically made from high-strength materials like aircraft-grade aluminum or steel. Look for adapters that are precisely machined for a secure and consistent fit. Robust construction is vital to prevent shifting or damage under recoil.
2. Compatibility
Ensure the adapter is compatible with both your rifle's dovetail rail and your scope's Picatinny rail. Check the specifications carefully to confirm the dimensions and tolerances. Incorrect sizing can lead to an insecure mount and potential safety hazards.
3. Finish
A durable finish like hard-anodizing or Cerakote protects the adapter from corrosion and wear. This is especially important if you're using the rifle in harsh environments.
4. Clamping Mechanism
The clamping mechanism should be secure and reliable. Look for designs with robust screws and a positive locking mechanism to ensure the adapter is firmly attached to the rifle and the scope. Poor clamping can lead to scope shift during shooting.
5. Manufacturer Reputation
Choose adapters from reputable manufacturers with a history of producing high-quality products. Reading reviews and checking online forums can help you identify reliable brands.
Installation and Use of a 20 MOA Dovetail to Picatinny Adapter
Installing a 20 MOA dovetail to Picatinny adapter is generally straightforward but requires careful attention to detail:
- Clean the Surfaces: Thoroughly clean both the rifle's dovetail rail and the adapter's mating surfaces before installation. This ensures a secure and accurate fit.
- Align and Secure: Carefully align the adapter with the rifle's dovetail rail and tighten the clamping screws evenly to avoid warping.
- Mount the Scope: Once the adapter is securely attached, mount your scope onto the Picatinny rail of the adapter. Follow the scope manufacturer's instructions for proper installation.
- Zero the Scope: After mounting, zero the scope at your preferred distance. Remember that the 20 MOA offset will affect your zeroing process.
Case Study: Improving Long-Range Accuracy
A competitive long-range shooter struggled to consistently hit targets beyond 600 yards due to the limitations of their scope's elevation adjustment. By installing a 20 MOA dovetail to Picatinny adapter, they gained the necessary elevation adjustment, significantly improving their accuracy and consistency at extended ranges.
Conclusion
The 20 MOA dovetail to Picatinny adapter is a valuable tool for long-range shooters and anyone needing to increase their scope's elevation adjustment range. Choosing a high-quality adapter from a reputable manufacturer is crucial for ensuring a secure, reliable, and accurate mounting solution. Remember to always follow proper installation procedures and prioritize safety.