The Hornady 139 grain SST (Super Shock Tip) in 7mm-08 Remington is a popular choice among hunters and long-range shooters. Its reputation for accuracy and consistent performance stems from a well-engineered bullet design coupled with the 7mm-08's inherent characteristics. This article delves into the ballistics of this specific cartridge and bullet combination, exploring its strengths and limitations. We'll analyze factors impacting its trajectory, energy retention, and suitability for various hunting applications.
Understanding the 7mm-08 Remington Cartridge
Before diving into the specifics of the 139 grain SST, it's crucial to understand the 7mm-08's characteristics. This cartridge, a favorite among many, offers a superb balance between manageable recoil, flat trajectory, and sufficient power for a wide range of game. Its moderate recoil makes it suitable for novice and experienced shooters alike, while its flatter trajectory extends effective range compared to some larger calibers.
Key Advantages of the 7mm-08:
- Manageable Recoil: Allows for quicker follow-up shots and reduced shooter fatigue.
- Flat Trajectory: Provides accurate shots at extended ranges.
- Versatile Cartridge: Suitable for a variety of game, from deer to antelope and even larger game with proper shot placement.
- Wide Availability: Ammo and components are readily available.
Hornady 139 Grain SST Bullet Performance
The Hornady 139 grain SST is a bonded, controlled-expansion bullet designed for consistent performance on game. The Super Shock Tip ensures reliable expansion, even at higher velocities, leading to humane and efficient kills. The bonded construction helps maintain bullet integrity, promoting deeper penetration.
Factors Influencing Ballistic Performance:
Several factors significantly influence the ballistic performance of the 139 grain SST in the 7mm-08:
- Muzzle Velocity: This varies depending on the firearm, barrel length, and powder load used. Higher muzzle velocities generally translate to a flatter trajectory and increased energy downrange. Expect muzzle velocities in the range of 2600-2800 fps from a typical 22-inch barrel.
- Barrel Twist Rate: The barrel's twist rate impacts bullet stability. A properly matched twist rate ensures accuracy and prevents yaw.
- Altitude and Temperature: Air density, affected by altitude and temperature, influences bullet trajectory and energy retention.
- Wind Conditions: Wind significantly impacts bullet trajectory, especially at longer ranges.
Ballistic Data and Trajectory (Approximate Values)
Precise ballistic data requires using a ballistic calculator with specific inputs (muzzle velocity, ballistic coefficient, etc.). However, we can provide approximate values based on typical muzzle velocities:
| Distance (yards) | Velocity (fps) | Energy (ft-lbs) | Drop (inches) |
|---|---|---|---|
| 100 | ~2400 | ~2200 | ~2 |
| 200 | ~2100 | ~1700 | ~10 |
| 300 | ~1800 | ~1300 | ~25 |
| 400 | ~1500 | ~1000 | ~50 |
Note: These values are estimations and can vary based on the factors mentioned above. Always use a ballistic calculator and consult your specific load data for accurate results.
Hunting Applications
The Hornady 7mm-08 139 grain SST is well-suited for a broad range of hunting applications, including:
- Deer Hunting: An excellent choice for deer hunting at moderate to longer ranges. The bullet's consistent expansion ensures clean kills.
- Antelope Hunting: Sufficient energy for ethical harvests, even at longer ranges.
- Other Medium-Sized Game: Suitable for other medium-sized game animals, depending on the specific species and ethical hunting considerations.
Conclusion
The Hornady 7mm-08 139 grain SST offers a compelling combination of accuracy, consistent performance, and manageable recoil. Its suitability for various hunting applications makes it a popular and versatile choice among hunters. Understanding its ballistic characteristics, however, is crucial for maximizing its potential and ensuring ethical hunting practices. Always consult with ballistic calculators and appropriate load data to ensure accuracy and safety. Remember to prioritize ethical hunting practices and responsible firearm handling.
