Quick Answer
The .338 Winchester Magnum's flat trajectory and sufficient kinetic energy at high altitudes make it effective for hunting moose at elevations up to 10,000 feet. However, its performance may degrade beyond this altitude due to atmospheric density changes. This affects the bullet's expansion and penetration.
Atmospheric Density and Bullet Expansion
At high altitudes, atmospheric density decreases, which can impact bullet expansion. The .338 Winchester Magnum uses a 300-grain bullet with a sectional density of 0.292. This type of bullet is designed for expansion at moderate velocities. However, at high altitudes, the reduced air density may cause the bullet to expand too quickly or not at all, resulting in inadequate penetration.
Elevation and Wind Drift Considerations
When hunting at high elevations, it’s essential to consider the bullet’s wind drift and trajectory. At 10,000 feet, the .338 Winchester Magnum’s trajectory will differ from the ballistic tables. A 100-grain increase in elevation will result in a 5.5-inch higher point of impact. To compensate, hunters should aim 2-3 inches higher for every 100 feet of elevation gain. Additionally, wind drift will increase by 2.5-3.5 inches for every 10 mph of wind at high altitudes.
Practical Considerations for Hunting Moose at High Elevations
When hunting moose at high elevations, it’s crucial to choose the right bullet and load. A 300-grain bullet with a ballistic coefficient of 0.550 or higher will provide the necessary penetration and expansion. Additionally, hunters should use a rifle with a muzzle brake or suppressor to minimize recoil and wind deflection. Finally, hunters should be prepared to make longer shots and adapt to changing conditions, such as wind and altitude, to ensure a successful hunt.
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