The 6.8mm Creedmoor cartridge, commonly known as the .22 Creedmoor, has quickly gained popularity among shooters for its accuracy, versatility, and moderate recoil. When it comes to reloading this round, Hodgdon H4350 is a frequently chosen propellant due to its excellent performance and suitability for various bullet weights. This comprehensive guide will delve into the intricacies of loading .22 Creedmoor ammunition using H4350, emphasizing safety and precision. We'll cover safe reloading practices, data sources, and considerations for different bullet weights and velocities.
Understanding the .22 Creedmoor Cartridge and H4350
The .22 Creedmoor boasts a distinct advantage in its efficient use of propellant, yielding impressive accuracy even with lighter bullets. This makes it a favorite for precision shooting, hunting, and even long-range target practice. H4350, a popular extruded propellant, is well-regarded for its consistent burn rate and excellent accuracy in a variety of calibers. Its characteristics align perfectly with the .22 Creedmoor’s needs, making it a top choice for handloaders. Choosing the right powder for a specific cartridge and bullet weight is crucial for achieving optimal performance and safety.
Key Characteristics of H4350:
- Extruded Powder: Provides consistent burn rates for improved accuracy and reduced pressure variations.
- Moderate Burning Rate: Suitable for a range of bullet weights and velocities in the .22 Creedmoor.
- High Energy Density: Maximizes velocity and reduces recoil compared to slower burning powders.
- Temperature Stability: Performs reliably in various temperature conditions.
Gathering Reliable 22 Creedmoor Load Data with H4350
Safety First! Always consult multiple reputable sources before beginning any reloading project. Never exceed maximum recommended loads. Improper loading can result in serious injury or damage to your firearm.
Reputable Sources of Load Data:
- Hodgdon Reloading Data Center: The official source for Hodgdon powder data. This is your primary resource. Always check the most recent updates on their website.
- Sierra Bullets: Provides detailed load data for their bullets specifically.
- Hornady Manufacturing: Similar to Sierra, Hornady offers load data optimized for their own projectiles.
- Barnes Bullets: A reputable source offering load data optimized for their premium bullets.
- Nosler: Another excellent source for load data paired with their wide range of bullets.
Note: Load data can vary slightly between manufacturers due to differences in bullet design, powder characteristics, and testing methodologies. Always refer to the manufacturer's load data for the specific bullets you're using.
Example Load Data (Illustrative - Not a Recommendation):
The following table presents example load data. Do not use this data without verifying it against the manufacturer's recommendations for your specific components and equipment. Always start at the minimum load and work your way up, carefully monitoring pressure signs.
| Bullet Weight (grains) | Bullet Manufacturer | Powder (H4350) (grains) | Primer | Case Length (inches) | COL (inches) | Velocity (fps) (Approximate) | Notes |
|---|---|---|---|---|---|---|---|
| 40 | Hornady | 38.0 | CCI BR-2 | 1.790 | 2.200 | 2800 | Start Load |
| 40 | Hornady | 40.0 | CCI BR-2 | 1.790 | 2.200 | 2900 | Maximum Load (Always verify with manufacturer) |
| 55 | Sierra | 40.0 | Federal 205 | 1.790 | 2.250 | 2650 | Start Load |
| 55 | Sierra | 42.5 | Federal 205 | 1.790 | 2.250 | 2750 | Maximum Load (Always verify with manufacturer) |
| 77 | Nosler | 41.0 | Remington 7 1/2 | 1.790 | 2.300 | 2400 | Start Load |
| 77 | Nosler | 43.5 | Remington 7 1/2 | 1.790 | 2.300 | 2500 | Maximum Load (Always verify with manufacturer) |
Disclaimer: This table is for illustrative purposes only and should not be used as a substitute for consulting the manufacturer's reloading data. Using incorrect data can lead to catastrophic equipment failure and injury.
Factors Affecting 22 Creedmoor Load Data
Several factors significantly influence the optimal load for your .22 Creedmoor:
- Bullet Weight: Heavier bullets generally require more powder to achieve the desired velocity.
- Bullet Type: The bullet's design (e.g., boat tail, spitzer) affects ballistic coefficient and therefore the required powder charge.
- Powder Lot: Powder characteristics can vary slightly between lots. Always use powder from the same lot for consistent results.
- Case Capacity: Slight variations in case capacity can impact pressure and velocity.
- Primer Type: Different primers can slightly affect ignition characteristics.
- Environmental Conditions: Temperature and humidity can affect powder burn rate.
Understanding Pressure Signs and Safety Precautions
Reloading is inherently dangerous. It’s crucial to recognize and understand pressure signs to prevent accidents. These signs include:
- Excessive Pressure: Flat primers, ejected cases showing signs of excessive expansion, unusually loud report, or excessive recoil.
- Case Head Separation: This is a serious indication of excessive pressure.
- Unusual Bullet Behavior: Keyholing or other unexpected bullet behavior suggests problems with the load or the firearm.
Always wear safety glasses and ear protection when reloading. Work in a well-ventilated area, and handle components with care. If you notice any unusual pressure signs, immediately cease loading and consult with experienced reloaders or a ballistics expert.
Conclusion: Responsible Reloading is Key
Reloading the .22 Creedmoor with H4350 can provide exceptional results in terms of accuracy and cost savings, but only with meticulous attention to safety and best practices. Always prioritize safety, double-check your data, and never hesitate to seek advice from experienced reloaders. By adhering to safe procedures and utilizing reliable data sources, you can enjoy the precision and performance that handloading offers. Remember, thorough research and responsible reloading are paramount to a safe and successful experience.