keep in mind that a lot of 7.62x39 ar,s have feed issues due to the mag not being curved that is the main issue with the conversion. That is also why the 300 blackout was designed. both are a little light on deer IMOO especialy if your shooting very far. I hunt a lot with a x39 and have killed a bunch of deer with it but Id rather have a little heaver bullet and a more speed to expand it. I have pulled nearly intact soft points in 7.62x39 out of deer that were shot at over 200 yards and i damm near could have reladed the bullet back in a shell it was so undamaged. not a lot of expansion going on.
SWEET, I'll be getting a complete 7.62x39 upper and mags next, my next investment. Thanks for the info, I didn't relize the lowers were the same for both cals., nice!! Recoil spring the same too?? Or do I need to change that out too?