Should 300 Blackout replace 7.62x39?

Unfiltered MAC on Twitter: https://twitter.com/MAC_Arms Join Patreon and support MAC! http://www.patreon.com/militaryarms Political Comentary: https://www.youtube.com/@secondlegacy Follow and support us on Utreon!: https://utreon.com/c/militaryarmschannel Follow us on Rumble: https://rumble.com/user/MilitaryArms MAC T-Shirt Store: https://ballisticink.com/collections/military-arms-channel Modern Gun School: http://www.mgs.edu We talk about 300 BLK on the US market and in todays environment if it makes more sense to adopt 300 BLK vs. 7.62x39.