Quick Answer
The .338 Federal and .338 Rem Mag differ in their case capacity and powder volume, resulting in varying trajectories and kinetic energy at impact, making the .338 Rem Mag a better choice for elk hunting due to its increased knockdown power.
Case Capacity and Ballistic Performance
The .338 Federal is a necked-down version of the .358 Winchester, with a case capacity of approximately 57.5 grains of water. In contrast, the .338 Rem Mag has a case capacity of around 85.5 grains of water, allowing for more powder and a longer barrel life. This increased powder volume translates to higher kinetic energy at impact, making the .338 Rem Mag a more effective option for larger game like elk.
Bullet Selection and Load Development
For elk hunting, it’s essential to use a bullet with sufficient weight and expansion to penetrate deep and deliver a quick kill. The .338 Federal typically uses 210-225 grain bullets, while the .338 Rem Mag can handle heavier bullets, up to 300 grains. When developing loads for elk hunting, it’s crucial to balance bullet weight, powder charge, and case capacity to achieve optimal performance.
Real-World Hunting Considerations
In real-world hunting scenarios, the difference between the .338 Federal and .338 Rem Mag can be significant. The .338 Rem Mag offers more flexibility in terms of bullet selection and load development, making it a better choice for elk hunting. However, the .338 Federal can still be effective with proper shot placement and bullet selection. When choosing between the two cartridges, consider the terrain, game size, and personal preference to make an informed decision.
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