The .338 Lapua Magnum (often shortened to 338 Lapua) is a powerful, long-range cartridge known for its exceptional accuracy and ballistic performance. Understanding its dimensions and specifications is crucial for anyone considering using this round, whether for long-range target shooting, hunting, or military applications.
Understanding the Cartridge Dimensions
The 338 Lapua Magnum's size is defined by several key measurements:
- Case Length: Approximately 82.0 mm (3.23 inches). This significant case length contributes to its impressive powder capacity and subsequent velocity.
- Bullet Diameter: .338 inches (8.64 mm). This diameter is responsible for the cartridge's name and signifies its substantial bullet size.
- Overall Length: This varies depending on the bullet used, but generally ranges from 100-110mm (approximately 4-4.3 inches). Heavier bullets will naturally result in a longer overall cartridge length.
- Neck Diameter: This dimension is crucial for proper bullet seating and influences the cartridge's overall performance. Specific measurements for neck diameter would require consulting ammunition manufacturer specifications.
- Shoulder Angle: This contributes to the cartridge's pressure curve and overall efficiency. Again, specific measurements are dependent on the manufacturer.
Beyond the Dimensions: Key Ballistic Characteristics
The physical dimensions of the 338 Lapua cartridge directly impact its ballistic performance. Key characteristics include:
- High Velocity: Capable of propelling bullets to extremely high velocities, often exceeding 3000 fps (feet per second) depending on the bullet weight and powder load. This contributes to its exceptional long-range capabilities.
- Flat Trajectory: The high velocity translates to a relatively flat trajectory, meaning less bullet drop over long distances, making accurate long-range shots significantly easier.
- High Energy: The combination of high velocity and bullet weight results in incredibly high energy, making it effective against large game animals at substantial ranges.
- Accuracy: Known for its excellent accuracy, particularly when used with high-quality ammunition and rifles designed for its use. Sub-MOA (Minute of Angle) accuracy is achievable with the right setup.
Choosing the Right Ammunition
When selecting 338 Lapua Magnum ammunition, it's essential to consider several factors beyond just its size:
- Bullet Weight: Available in a wide range of bullet weights, from lighter options for long-range target shooting to heavier bullets optimized for hunting. The bullet weight heavily influences the trajectory and energy of the round.
- Bullet Type: Various bullet types (e.g., Match, Hunting, FMJ) are available, each designed for a specific purpose and offering different ballistic characteristics.
- Manufacturer Reputation: Opting for ammunition from reputable manufacturers ensures consistent quality and performance.
Safety Considerations
The 338 Lapua Magnum is a powerful cartridge, demanding respect for safety protocols. Always:
- Use appropriate hearing and eye protection.
- Handle the firearm responsibly and follow all safety rules.
- Ensure proper firearm maintenance.
- Store ammunition safely and securely.
This information provides a comprehensive overview of 338 Lapua Magnum ammunition size and related characteristics. However, always refer to the manufacturer's specifications for precise measurements and safety guidelines before handling or using this powerful cartridge. Further research into specific bullet types and their performance characteristics will further enhance your understanding.
