The Winchester Model 70 is a legendary rifle, renowned for its accuracy and robust construction. Many shooters find themselves wanting to customize their Model 70s to chamberings not offered from the factory. Converting a Winchester Model 70 to 6mm GT is a popular choice, offering a versatile cartridge ideal for hunting and long-range target shooting. This guide will explore the process, considerations, and costs involved in this conversion.
Understanding the 6mm GT Cartridge
Before diving into the conversion process, it's crucial to understand the 6mm GT (6mm Gunwerks Thunderbolt) cartridge. It's a relatively new, highly accurate cartridge known for its flat trajectory and excellent long-range performance. Its popularity stems from its ability to deliver exceptional ballistic performance at extended distances, making it a favorite among precision shooters and hunters seeking long-range capabilities.
The Conversion Process: A Detailed Breakdown
Converting a Winchester Model 70 to 6mm GT isn't a simple DIY project. It requires the expertise of a qualified gunsmith specializing in custom rifle builds. Here's a breakdown of the steps involved:
1. Barrel Selection and Installation:
This is arguably the most crucial aspect of the conversion. The gunsmith will need to select a high-quality, pre-fit or custom-made barrel chambered in 6mm GT. The choice of barrel material (stainless steel, carbon fiber) and contour will influence accuracy and weight. The gunsmith will then carefully remove the original barrel and install the new 6mm GT barrel, ensuring proper headspace and concentricity. This process requires specialized tools and considerable skill.
2. Bolt Face Modification:
The original bolt face may need modification to accommodate the 6mm GT cartridge's dimensions. A gunsmith will ensure the bolt face is properly machined to safely and reliably handle the 6mm GT rounds. This step is critical for safety and reliable function.
3. Magazine Modification or Replacement:
The factory magazine may not be compatible with the 6mm GT cartridge. The gunsmith might need to modify the existing magazine or replace it with a custom-made magazine designed specifically for the 6mm GT in the Model 70 action.
4. Action Work (if necessary):
Depending on the specific Model 70 and the desired level of customization, additional action work might be required. This could involve trigger work, bedding, or other modifications to optimize the rifle's performance.
5. Testing and Refinement:
After the conversion, thorough testing at the range is essential to ensure accuracy and reliability. The gunsmith will likely perform several test firings to fine-tune the rifle's performance and ensure everything functions flawlessly.
Costs and Considerations:
Converting a Winchester Model 70 to 6mm GT is a significant investment. The overall cost will depend on several factors including:
- Barrel cost: High-quality barrels can range from a few hundred to over a thousand dollars.
- Gunsmithing fees: Labor costs will vary depending on the gunsmith's experience and location. Expect to pay several hundred to a thousand dollars for the gunsmithing services.
- Magazine cost (if applicable): Custom magazines add to the overall expense.
- Additional work: Any additional action work, such as trigger jobs or bedding, will increase the final cost.
Choosing the Right Gunsmith:
Selecting a skilled and reputable gunsmith is paramount. Look for gunsmiths with proven experience in custom rifle builds and a strong track record of working with the Winchester Model 70. Check online reviews and seek recommendations from other shooters before making your decision.
Conclusion:
Converting a Winchester Model 70 to 6mm GT offers a rewarding upgrade for shooters seeking a highly accurate and versatile rifle. However, it's a significant undertaking that demands professional expertise and careful planning. By understanding the process, costs, and considerations involved, you can make an informed decision and enjoy the benefits of your customized 6mm GT Winchester Model 70 for years to come. Remember, safety is paramount. Always prioritize working with a qualified gunsmith to ensure a safe and successful conversion.
