The 7.62x39mm was developed in Russia as a mid-size military cartridge and is among the most widespread military cartridges used today. The AK47 and its variants, along with the SKS, have made this cartridge very popular in the civilian market due to the sheer number of affordable surplus firearms available.
Brass is sized for use with standard 0.311" diameter bullets, it will need to be neck sized if used with 0.308" diameter bullets.
Starline is a family owned business and prides itself on producing the highest quality brass case available. With a production process focused on quality not quantity, Starline makes the finest brass and has for more than 40 years out of their state-of-the-art manufacturing facility in Sedalia, MO.