The 7mm-08 Remington is a popular cartridge known for its accuracy and versatility, making it a favorite among hunters and target shooters alike. This guide focuses specifically on reloading data for the Hornady 139 gr SST bullet, providing detailed information to ensure safe and effective reloading practices. Always prioritize safety and consult your reloading manual before attempting any reloading. This information is for guidance only and should not replace your own research and caution.
Understanding the Hornady 139 gr SST
The Hornady 139 gr SST (Super Shock Tip) is a highly regarded bullet designed for hunting applications. Its construction features a polymer tip for enhanced ballistic coefficient and consistent expansion, making it suitable for various game sizes. The boat-tail design further contributes to its aerodynamic performance and accuracy at longer ranges.
Key Considerations Before Reloading
Before diving into specific reloading data, it's crucial to understand the essential factors influencing the process:
- Your Rifle: The chamber specifications of your specific 7mm-08 rifle are paramount. Slight variations between rifles can affect optimal powder charges. Never exceed the maximum recommended load listed in your chosen reloading manual.
- Powder Type: The type of powder used significantly impacts pressure and velocity. Using the wrong powder can lead to dangerous pressure spikes. Strictly adhere to data specific to the powder you've chosen.
- Primer Type: While less critical than powder, primer selection can influence ignition consistency. Use the type of primer recommended in your reloading data.
- Case Condition: Use clean, properly sized, and inspected brass cases. Damaged cases can lead to inconsistent pressures and potentially dangerous situations.
- Bullet Seating Depth: Proper bullet seating depth affects accuracy and overall performance. Start with the recommended seating depth and make minor adjustments as needed to optimize accuracy.
Sample Reloading Data for Hornady 139 gr SST (7mm-08)
Disclaimer: The following data is for informational purposes only and should not be considered a substitute for your own research and the use of a reputable reloading manual. Always consult your reloading manual for the most up-to-date and safe loading data for your specific components and equipment. Failure to do so could result in serious injury or damage.
This table is a representation and may not cover all powder options. Always cross-reference with your reloading manual.
| Powder | Powder Charge (Grains) | Velocity (fps) (approx.) | COL (inches) | Primer | Notes |
|---|---|---|---|---|---|
| [Powder Name 1] | [Charge 1] | [Velocity 1] | [COL 1] | [Primer 1] | [Manufacturer's Data Reference] |
| [Powder Name 2] | [Charge 2] | [Velocity 2] | [COL 2] | [Primer 2] | [Manufacturer's Data Reference] |
| [Powder Name 3] | [Charge 3] | [Velocity 3] | [COL 3] | [Primer 3] | [Manufacturer's Data Reference] |
[Replace bracketed information with data from a reputable reloading manual. Include specific powder names, charges, velocities, and COL (overall length) measurements.]
Developing Your Load
Even with starting data, you'll need to work up to your optimal load. This involves starting with the minimum recommended charge and gradually increasing in small increments (0.1 to 0.3 grains), meticulously noting velocity and pressure signs. Always check for signs of excessive pressure, such as flattened primers or unusually hard bolt lift. This process requires patience, attention to detail, and a chronograph for accurate velocity measurements.
Safety First!
- Always wear safety glasses and hearing protection.
- Never exceed maximum recommended loads.
- Clean your firearm thoroughly after each shooting session.
- Store ammunition in a cool, dry, and secure location.
- Properly dispose of any misfired rounds.
This information is intended for experienced reloaders. Beginners should seek guidance from experienced reloaders or attend a certified reloading course before attempting to reload ammunition. Remember that safe and responsible reloading practices are paramount.
