Quick Answer
The .338 Lapua and .338 Winchester Magnum differ in their case length, bullet weight, and performance at long ranges. The .338 Lapua is generally considered more suitable for long-range shooting due to its larger case capacity and more stable trajectory. It is also more efficient for use with heavy bullets.
Case Capacity and Rifle Design
The .338 Lapua has a case length of 2.067 inches, whereas the .338 Winchester Magnum has a case length of 2.500 inches. This difference in case capacity affects the rifle’s design, as the .338 Lapua requires a longer action and a more substantial bolt. The increased case capacity of the .338 Lapua allows for a higher powder charge, which results in a flatter trajectory and improved accuracy.
Ballistic Performance at Long Ranges
The .338 Lapua is designed for long-range shooting and is commonly used in sniper rifles. It has a muzzle velocity of approximately 2,900 feet per second, which allows it to maintain accuracy and kinetic energy at ranges of over 1,500 yards. In contrast, the .338 Winchester Magnum has a muzzle velocity of around 2,600 feet per second, which limits its effective range to around 1,000 yards.
Bullet Weight and Performance
The .338 Lapua is typically loaded with heavier bullets, ranging from 250 to 300 grains. These heavier bullets offer improved penetration and expansion, making them suitable for hunting large game at long ranges. In contrast, the .338 Winchester Magnum is often loaded with lighter bullets, ranging from 200 to 250 grains, which are better suited for hunting smaller game.
Find more answers
Browse the full Q&A library by topic, or jump back to the topic this question belongs to.