in 7.62X39, it is hard to beat Golden Tiger and Yugo M67. Clean the rifle well after M67 and you should be good to go. If the prices are close, skip Wolf and go for one of these.
I shot soda cans with Herters steel case 7.62 this past weekend and for the life of me, I could not hit anything
Then I switched to 5.56 and hit them with almost every shot.
I've had better luck with Barnaul 5.45 products, but I mainly use their Bear branded or spam can (no longer available) products. Can't say the same about Wolf 5.45 ammo made by Barnaul though.