Quick Answer
The .270 WSM performs reasonably well in humid conditions due to its relatively fast case expansion and moderate powder burn rate, which helps minimize the effects of moisture on the cartridge's accuracy and reliability.
Reliability in Humid Conditions
The .270 WSM’s 67-grain case expansion is relatively fast compared to other cartridges in its class. This means that it resists the expansion of gases when fired in humid environments, which can affect the accuracy of other cartridges. As a result, the .270 WSM remains a reliable choice for hunting in humid conditions.
Performance in Elk and Deer Hunting
The .270 WSM’s moderate powder burn rate (around 65,000 psi) helps to maintain accuracy even in humid environments. This makes it suitable for hunting elk and deer, where a reliable and accurate shot is critical. Elk, in particular, require a powerful cartridge, and the .270 WSM’s 130-grain bullets have proven effective in taking down these animals.
Additional Considerations
When hunting in humid conditions, it’s essential to consider the specific ammunition used. Some bullets, such as those with a wax coating or copper jackets, may perform better in humid environments. Additionally, shooters should take necessary precautions to ensure their rifle remains clean and dry, even in humid conditions.
Find more answers
Browse the full Q&A library by topic, or jump back to the topic this question belongs to.