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Q&A · Hunting

What is minimum bullet weight for deer with .300 Blackout?

April 5, 2026

Quick Answer

The minimum bullet weight for deer with .300 Blackout is 90 grains, but 110-120 grains is a more effective and recommended range for hunting larger deer species.

Choosing the Right Bullet

When it comes to hunting deer with a .300 Blackout AR-15, choosing the right bullet is crucial for success. While a 90-grain bullet may be sufficient for smaller deer, it may not have enough kinetic energy to take down larger deer species. For this reason, many hunters opt for 110-120 grain bullets, which provide a significant increase in kinetic energy and are more likely to result in a quick and humane kill.

Bullet Performance and Expansion

A 110-120 grain bullet will typically expand to a larger diameter upon impact, which is essential for transferring kinetic energy to the deer and preventing over-penetration. When choosing a bullet for deer hunting, look for ones with a high ballistic coefficient (BC) and a designed expansion ratio of at least 1.2:1. This will ensure that the bullet expands properly and provides a clean and humane kill.

Real-World Experience and Performance

In real-world hunting scenarios, many hunters have reported success with 110-120 grain bullets in .300 Blackout rifles. These bullets have proven to be effective at distances of up to 200 yards and have resulted in quick and humane kills. When hunting with a .300 Blackout, it’s essential to keep in mind that the bullet’s kinetic energy will decrease with distance, so it’s crucial to aim for a central shot placement to ensure a quick kill.

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