Quick Answer
The best time for testing new big game loads is during the late summer or early fall, when temperatures and humidity levels are relatively stable, allowing for more accurate and reliable expansion testing.
Pre-Season Testing
Testing new big game loads during the pre-season is crucial for understanding bullet expansion behavior. Late summer or early fall is ideal, as it typically offers stable temperatures, ranging from 60°F to 80°F (15°C to 27°C), and relatively low humidity levels, between 40% to 60%. This allows for more accurate and consistent expansion testing.
Controlled Expansion Conditions
When testing new loads, it’s essential to maintain a controlled environment with minimal variables to ensure reliable results. To achieve this, use a temperature-controlled chamber or a shaded area with consistent temperature readings. For a more precise test, use a controlled expansion fixture, such as a Leupold Expansion Test Fixture, which ensures consistent bullet seating depths and alignment. Testing at 1,000 yards or less is recommended to minimize the impact of external factors, like wind and atmospheric conditions.
Real-World Expansion Testing
When testing new loads in the field, ensure you’re using a reliable and accurate method. The Lyman Expander Test Kit is a valuable tool for in-field testing, allowing you to measure bullet expansion and assess its consistency. To achieve accurate results, maintain a consistent bullet seating depth, and use a reliable chronograph to monitor muzzle velocity. Additionally, consider testing multiple rounds from the same load to account for any potential variations in expansion behavior.
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