Quick Answer
When choosing ammunition grain for elk with an AR-10, select a heavy grain weight (at least 160 grains) for maximum stopping power, and consider a bullet style with a high ballistic coefficient (BC) for accuracy over long ranges. The right grain weight and BC will also minimize wind drift and ensure a clean kill. A heavier bullet will also penetrate deeper into the elk's body.
Choosing the Right Grain Weight
When selecting a grain weight for elk hunting with an AR-10, it’s essential to consider the range you’ll be shooting from and the type of elk you’re hunting. For ranges under 400 yards, a 160-170 grain bullet is a good choice. However, for longer ranges, consider a heavier 200-220 grain bullet, which will maintain its velocity and provide a larger wound channel upon impact. This is particularly important when hunting larger elk or those with thick coats.
Bullet Style and Ballistic Coefficient
A high BC is critical for accuracy and stability over long ranges. Look for bullets with a BC of at least 0.5, but ideally 0.6 or higher. Examples of bullets that meet this criterion include the 160-grain Sierra MatchKing and the 200-grain Berger VLD. When selecting a bullet style, consider the type of hunting you’ll be doing. For example, a bullet with a large meplat (flat nose) may be more effective for hunting larger elk, while a more streamlined bullet may be better suited for longer ranges.
Real-World Testing and Practice
Before taking your AR-10 elk hunting, practice shooting at various ranges and conditions to ensure you’re comfortable with your chosen ammunition. Test your rifle’s accuracy and zero it in at 100 yards to ensure you’re on target. Additionally, consider practicing hunting with a spotter or range finder to help you accurately estimate ranges and make clean kills.
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