The .338 Lapua Magnum (often shortened to 338 Lapua) is a powerful, long-range cartridge known for its exceptional accuracy and stopping power. Understanding its dimensions and ballistics is crucial for anyone considering using this round. This guide delves into the specifics of 338 Lapua ammo size and related factors.
Understanding 338 Lapua Ammo Dimensions
The 338 Lapua Magnum's size isn't simply defined by a single number. Several key dimensions contribute to its overall profile and performance characteristics. These include:
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Case Length: This is a crucial dimension, typically around 2.82 inches (71.6 mm). Variations can exist depending on the manufacturer and specific ammunition load. The case length dictates the amount of propellant that can be accommodated, directly affecting the cartridge's ballistic performance.
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Bullet Diameter: As the name suggests, the bullet diameter is .338 inches (8.64 mm). This is the actual diameter of the projectile that leaves the barrel. Choosing the right bullet weight and design is vital for optimizing accuracy and achieving desired ballistic results at various ranges.
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Overall Cartridge Length: The overall length incorporates the case length, bullet length, and any additional components like the primer. The overall length typically falls within a range of approximately 3.8 to 4.1 inches (96 to 104 mm), depending again on bullet choice.
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Neck Diameter: This is the diameter of the neck of the cartridge case, which holds the bullet. The neck's size ensures a secure fit for the bullet, impacting accuracy and preventing issues during feeding and chambering.
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Shoulder Angle: The shoulder angle of the cartridge case influences how efficiently the pressure is built up during firing. The 338 Lapua's relatively steep shoulder angle contributes to its high velocity.
Ballistic Performance: A Key Factor Related to Size
The 338 Lapua Magnum's size contributes directly to its exceptional ballistic performance. The larger case capacity allows for a greater propellant charge, resulting in higher muzzle velocities compared to smaller cartridges. This translates into:
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Extended Range: The high velocity and aerodynamic bullet designs allow the 338 Lapua to maintain its accuracy and energy at extremely long ranges.
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Increased Accuracy: The precision manufacturing of the cartridge and its components, coupled with its inherent ballistic characteristics, contributes to outstanding accuracy, even at extreme distances.
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Significant Stopping Power: The larger bullet diameter and high velocity deliver impressive stopping power, making it a preferred choice for long-range hunting and precision shooting applications.
Choosing the Right 338 Lapua Ammo
When selecting 338 Lapua ammo, consider these factors besides size:
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Bullet Weight: Bullet weight significantly impacts trajectory, energy retention, and range. Heavier bullets generally have flatter trajectories but may have reduced velocity.
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Bullet Construction: Different bullet constructions (e.g., match-grade, hunting, target) are designed for specific applications.
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Manufacturer Reputation: Choose reputable ammunition manufacturers known for consistent quality and reliability.
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Intended Use: Whether for target shooting, hunting, or other applications will guide your choice of ammunition.
Conclusion
Understanding the dimensions and ballistics of 338 Lapua Magnum ammo is essential for its effective and safe use. This detailed breakdown provides a comprehensive understanding of the cartridge's size and how its design contributes to its impressive performance characteristics. Remember to always consult your firearm's manual and follow all safety precautions when handling and using ammunition.
