Ideal bullet weight for .270 WSM in Western big game hunting?

Bullet Selection and Performance

When choosing a bullet for the .270 WSM, consider the expansion characteristics and penetration potential. A 130-150 grain bullet weight typically offers the best balance between the two, ensuring reliable expansion and adequate penetration on Western big game such as elk and deer. For example, the Barnes VOR-TX 130 grain TTSX and the Hornady SST 140 grain bullets are popular choices for the .270 WSM, offering exceptional expansion and penetration capabilities.

Load Development and Ballistics

To achieve optimal performance, it is essential to develop a load that suits the specific bullet weight and rifle combination. Use a chronograph to determine the average muzzle velocity and ensure that the load is within safe parameters. For a .270 WSM, a typical load development process would involve starting with a base load of 62-64 grains of Imr 4350 powder and adjusting from there, depending on the specific bullet weight and desired velocity. Aiming for a muzzle velocity of 3,000-3,200 feet per second (fps) is a good starting point.

Real-World Performance and Hunting Considerations

When hunting Western big game, consider the specific hunting situation and adjust the bullet weight and load accordingly. For example, in mountainous terrain with long shots, a heavier bullet weight such as 150 grains may be more suitable to ensure adequate penetration and expansion. Conversely, in dense cover or at shorter ranges, a lighter bullet weight such as 130 grains may be more effective to minimize over-penetration and damage to surrounding vegetation.