The 400 Legend cartridge is quickly gaining popularity among shooters, and understanding its case dimensions is crucial for reloaders, gunsmiths, and anyone interested in this versatile round. This comprehensive guide delves into the specifics of 400 Legend case dimensions, exploring its key features and comparing it to similar cartridges.
Understanding 400 Legend Cartridge Dimensions
The 400 Legend cartridge, developed by Winchester, is designed for use in AR-15 platform rifles. Its key feature is its relatively short, straight-walled case, optimized for use in semi-automatic firearms and offering improved accuracy compared to other straight-walled calibers. This shorter case length means less recoil and improved handling, making it a great option for hunting and target shooting.
Key Dimensions of the 400 Legend Case:
The following table outlines the crucial dimensions of a standard 400 Legend cartridge case:
| Dimension | Measurement (Inches) | Measurement (mm) | Tolerance |
|---|---|---|---|
| Case Length | 1.164 | 29.57 | ±0.005 |
| Base Diameter | 0.480 | 12.19 | ±0.002 |
| Neck Diameter | 0.376 | 9.55 | ±0.002 |
| Shoulder Diameter | 0.470 | 11.94 | ±0.002 |
| Rim Diameter | 0.484 | 12.30 | ±0.002 |
Note: These dimensions are based on SAAMI (Sporting Arms and Ammunition Manufacturers' Institute) specifications and might vary slightly depending on the manufacturer. Always consult the manufacturer's specifications for precise measurements when reloading.
Comparing 400 Legend to Other Cartridges
The 400 Legend sits comfortably within the realm of straight-walled cartridges popular in many states for deer hunting. Let’s compare it to some common contenders:
| Cartridge | Case Length (Inches) | Case Length (mm) | Comments |
|---|---|---|---|
| 400 Legend | 1.164 | 29.57 | Optimized for AR-15 platforms, reduced recoil. |
| .300 Blackout | 1.160 | 29.46 | Popular AR-15 cartridge, good for short-range applications. |
| .450 Bushmaster | 1.150 | 29.21 | Powerful straight-walled cartridge, greater recoil than 400 Legend. |
| .350 Legend | 1.290 | 32.77 | Newer cartridge by Winchester; similar ballistics to 30-30, larger case |
| 30-30 Winchester | 1.510 | 38.35 | A classic lever-action cartridge, longer case than 400 Legend. |
As you can see, the 400 Legend’s case length falls squarely in the middle of these examples, offering a good balance between capacity and manageability within the AR-15 platform. Its straight-walled design facilitates reliable feeding and extraction.
Implications of 400 Legend Case Dimensions for Reloading
The relatively short case length of the 400 Legend makes it relatively easy to reload. However, precision is still key, as slight variations in case dimensions can impact accuracy. Careful attention to proper sizing and trimming techniques is essential. Reloading dies are specifically designed for the 400 Legend to ensure optimal results.
Tips for Reloading 400 Legend:
- Use a case trimmer: Maintaining consistent case length is critical for accuracy and reliable feeding.
- Proper case sizing: Use a sizing die appropriate for the 400 Legend to avoid damaging the case.
- Use a quality scale: Accurate powder measurement is essential for consistent performance and safety.
- Consult reloading manuals: Always refer to a reliable reloading manual for specific load data and recommended procedures for the 400 Legend.
Conclusion: The Significance of 400 Legend Case Dimensions
Precise knowledge of 400 Legend case dimensions is crucial for various applications, from ammunition manufacturing to custom load development and gunsmithing. Understanding these dimensions provides a foundational knowledge of the cartridge’s performance characteristics and potential. Whether you are a seasoned reloader, a gun enthusiast, or simply curious about this popular cartridge, this information is essential for appreciating the 400 Legend's unique place in the firearms world. Remember to always consult reputable sources and prioritize safety when handling firearms and ammunition.