_We may earn revenue from the products available on this page and participate in affiliate programs. Learn more › The 300 Blackout and 5.56x45mm NATO are two of the most popular cartridges commonly ...
The 300 Blackout provides users a larger caliber option to 5.56mm in the same platform size. The 300 Blackout has an efficiency advantage compared to the 5.56 when used in shorter barreled firearms.
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