WHAT DOES RED ARMY STANDARD 7.62×39 MEAN?

Primers ended up strike, didn't fireplace! Contacted S&B about The difficulty, nothing at all was performed about it. Rounds ended up fired through my Smith and Wesson 1911 Personal computer which is usually on point with other makes of ammo. Hezekiah mentioned: Completely satisfied with my knowledge. Will propose to my friends and family. Clinton