Quick Answer
.270 WSM performance varies by elevation, with its effective range and ballistics impacted by changes in atmospheric pressure and temperature at higher elevations.
Pressure and Altitude Impact
The .270 WSM is a relatively flat-shooting cartridge, but its performance is affected by changes in atmospheric pressure and temperature at higher elevations. As altitude increases, air pressure decreases, causing bullets to lose kinetic energy and range. For example, at 10,000 feet, the .270 WSM’s muzzle velocity drops by approximately 100-150 feet per second compared to sea level.
Ballistic Table Example
Using a ballistic table or calculator for the .270 WSM, we can see the following drop and drift at different elevations:
- Sea level, 500 yards: 10.5 inches drop, 0 inches drift
- 5,000 feet, 500 yards: 11.5 inches drop, 2 inches drift
- 10,000 feet, 500 yards: 14.5 inches drop, 4 inches drift
Adjusting for Elevation
To compensate for the effects of elevation on the .270 WSM, hunters can adjust their shooting technique and equipment. For example, using a high-performance scope with a ballistic reticle can help compensate for the drop and drift at higher elevations. Additionally, hunters can use a ballistic calculator or consult a ballistic table to determine the necessary adjustments for their specific shot placement and elevation.
Find more answers
Browse the full Q&A library by topic, or jump back to the topic this question belongs to.