What is Ballistic Coefficient of .338 Winchester Magnum Bullets?

Ballistic Coefficient Importance

The ballistic coefficient (BC) is a crucial parameter when selecting ammunition for hunting large game such as moose. A higher BC indicates a more aerodynamic bullet, which will maintain its trajectory better over long ranges and provide more consistent shot placement. In the case of .338 Winchester Magnum, a BC of 0.500 or higher is generally preferred for hunting at ranges exceeding 300 yards.

Bullet Weight and BC Correlation

While the BC of .338 Winchester Magnum bullets can vary between manufacturers, it tends to increase with bullet weight. For example, a 225-grain bullet may have a BC of 0.475, while a 250-grain bullet can achieve a BC of 0.525. This is because heavier bullets tend to have a more streamlined shape, which reduces drag and enhances their aerodynamic performance. When selecting ammunition for moose hunting, it’s essential to consider the BC in conjunction with other factors such as bullet type, velocity, and kinetic energy to ensure the best possible shot placement and success.

MOA and Drop Expectations

At 300 yards, a .338 Winchester Magnum bullet with a BC of 0.500 will drop approximately 34.5 inches, while the same bullet at 400 yards will drop around 63.5 inches. These drops can be significant, and understanding the expected trajectory is essential for making accurate shots at long range. Using a ballistic calculator or consulting a shooting guide can help hunters accurately compensate for bullet drop and make more effective shots on large game like moose.