Quick Answer
Yes, there is a penetration threshold for big game loads, which is influenced by the type of bullet used, its velocity, and the animal's hide and muscle thickness. Generally, a penetration depth of 12-18 inches is considered adequate for most big game hunting. However, this can vary depending on the specific circumstances.
Understanding the Role of Bullet Expansion
Controlled expansion bullets are designed to expand upon impact, increasing their diameter and maintaining weight to ensure deep penetration. The expansion ratio, typically between 1.2 to 1.5, is critical in achieving the desired penetration depth. A bullet with a high expansion ratio may over-expand, potentially sacrificing penetration for larger diameter.
Measuring Penetration Threshold
To determine the penetration threshold of a big game load, we can use the following general guidelines: for deer and pronghorn, a minimum penetration depth of 12 inches is recommended. For larger game like elk and moose, a minimum of 18 inches is often required. These thresholds can vary depending on the specific circumstances, including the animal’s size, angle of shot, and type of bullet used.
Factors Influencing Penetration Threshold
Several factors can influence the penetration threshold of a big game load, including the type of bullet used, its velocity, and the animal’s hide and muscle thickness. Bullets with a higher velocity or those designed for deep penetration, such as those with a bonded construction, may be more effective in achieving the desired penetration depth. Conversely, bullets with a lower velocity or those prone to fragmentation may fall short of the required penetration threshold.
Find more answers
Browse the full Q&A library by topic, or jump back to the topic this question belongs to.