Here's what you need to know about the pros and cons of the .300 Blackout vs 7.62x39 cartridges. The better choice of the two is
300 Blackout vs 7.62x39: Which is Better?
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7.62x39mm 123gr. Controlled Chaos® Solid Monolithic Hunting Ammo
Can I shoot 7.62 x39 in my 300 Blackout? - Quora
I heared some people saying .300 blackout can be fired in .223 Remington rifle. Is this true considering that these are two different calibers? - Quora
What is louder, the .300 Blackout or a 5.56 from a 7.5 inch barrel without a suppressor, or are they about the same? - Quora
Is the 300 black out based on an AR-15 or AR10 platform? - Quora
300 Blackout vs 7.62x39: Never Would've Guessed
7.62x39 vs 300 Blackout: Caliber Comparison by
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Who Tee Who's Hunting Cartridge Showdown: 7.62x39 vs 300 Blackout
What is louder, the .300 Blackout or a 5.56 from a 7.5 inch barrel without a suppressor, or are they about the same? - Quora
Since it's been harder to come by combloc calibers for a little while now, would akm owners consider one chambered in 300 blackout (7.62x35) as an alternative to the ubiquitous 7.62x39 (price
Can a 300 blackout shoot 223 ammunition? - Quora