The .45-70 Government cartridge, a venerable round with a rich history, continues to captivate shooters. Its power and accuracy, especially when loaded with cast bullets, make it a favorite for hunting, target shooting, and even Cowboy Action Shooting. This guide delves into safe and effective load data for cast bullets in the .45-70 Government, emphasizing accuracy and safety. Always remember to consult your specific reloading manual before attempting any reloading. This information is for educational purposes only and should not be considered a substitute for proper reloading instruction.
Understanding Cast Bullet Considerations in .45-70
Cast bullets offer several advantages in the .45-70: they are relatively inexpensive to produce, readily available, and can deliver excellent accuracy. However, they require a nuanced approach to loading compared to jacketed bullets. Key considerations include:
Bullet Hardness:
The hardness of your cast bullet is crucial. Too soft, and the bullet will deform excessively in the barrel, leading to accuracy issues and potentially damaging your firearm. Too hard, and it may damage your rifling. A hardness of BHN 10-12 is generally recommended for .45-70 Government cast bullets. The specific hardness you choose will depend on factors such as your barrel's rifling, velocity, and alloy composition.
Bullet Lubrication:
Proper lubrication is vital for accurate and reliable feeding of cast bullets. A suitable lubricant will reduce friction in the barrel, preventing leading and improving accuracy. Common lubricants include Lee Liquid Alox, powder coated bullets, and various commercially available cast bullet lubricants. Experiment to find what works best for your setup.
Case Preparation:
Consistent case preparation is essential for accurate and safe reloading. This includes full-length resizing, removing any primer pockets, and cleaning the cases thoroughly. Ensure your cases are properly trimmed to the correct length.
Powder Selection:
Selecting the appropriate powder is critical. Some powders work better with cast bullets than others. Slow-burning powders are generally preferred for .45-70 cast bullet loads, providing optimal pressure curves and improved accuracy at lower velocities. Popular choices often include IMR 4198, IMR 3031, and various other slow-burning propellants. Always reference a reloading manual for specific powder recommendations and maximum load data.
Sample Load Data (Illustrative Purposes Only)
Disclaimer: The following load data is for illustrative purposes only. It is not a substitute for consulting your reloading manual. Always start with minimum loads and work your way up gradually, carefully observing for pressure signs.
| Bullet Weight (grains) | Bullet Type | Powder Type | Powder Charge (grains) | Primer | COL (inches) | Notes |
|---|---|---|---|---|---|---|
| 300 | 45-70 Cast, BHN 10-12, Gas Checked | IMR 3031 | 40 | CCI 200 | 2.565 | Start Low, Work Up |
| 350 | 45-70 Cast, BHN 10-12, Gas Checked | IMR 4198 | 45 | CCI 200 | 2.600 | Start Low, Work Up |
| 500 | 45-70 Cast, BHN 10-12, Gas Checked | IMR 4198 | 55 | CCI 200 | 2.650 | Start Low, Work Up |
Note: COL (Cartridge Overall Length) is the distance from the tip of the bullet to the base of the cartridge case. The provided COL values are examples and may vary slightly depending on your specific bullet and case dimensions. Always double-check the COL before loading.
Safety Precautions
- Always wear safety glasses and hearing protection when reloading.
- Never exceed maximum load data from a reputable reloading manual.
- Carefully inspect your cases and bullets before loading.
- Never mix powders.
- Store your reloading supplies in a safe and secure location.
- If you are unsure about anything, seek advice from an experienced reloader.
This guide provides foundational information for loading cast bullets in the .45-70 Government. Remember, safe and responsible reloading practices are paramount. Thorough research, careful attention to detail, and a respect for the potential hazards are essential for success and safety. Consult your reloading manual, and always prioritize safety.
