Quick Answer
The .450 Bushmaster is a reliable cartridge for hunting with short barrel AR-15s, but it's crucial to consider barrel length, ammunition selection, and rifle configuration for optimal performance.
Barrel Length Considerations
When using a .450 Bushmaster in a short barrel AR-15, it’s essential to ensure the barrel is at least 16 inches long. This barrel length provides sufficient room for the cartridge’s expansion and helps maintain a stable twist rate. A 16-inch barrel is the minimum recommended length, and some manufacturers recommend a 18-inch barrel for optimal performance.
Ammunition Selection
Choosing the right ammunition is critical when hunting with a .450 Bushmaster in a short barrel AR-15. Look for cartridges with a minimum of 250 grains and a muzzle energy of 1,500 ft-lbs. Some popular loads include the Hornady 250-grain and the Barnes 300-grain TSX. These cartridges offer excellent expansion and penetration, making them suitable for hunting larger game.
Rifle Configuration
To ensure reliable function and accuracy, configure your rifle with a suitable gas system and a heavy barrel. A mid-length or rifle-length gas system is recommended, as it helps to slow down the gas flow and reduces the risk of over-gassing. Additionally, a heavy barrel with a twist rate of 1:24 or slower is necessary to stabilize the heavier .450 Bushmaster cartridges.
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