I'm not sure what you mean by "keyhole" issues with the Russian ammo, but if you mean that the bullets are keyholing on the target, that is exactly what it's designed to do.
5.45 ammo as you probably know, has a cavity in the nose section. This makes the bullet have a better ballistic coefficient (because it's longer) and also makes the bullet heavier in the back. When it strikes resistance, the heavier portion (rear) will transfer energy forward, causing the bullet to tumble quickly. Almost all bullets will do this, but the 5.45 will do it much faster because of the cavity.
These bullets will peform like this almost everytime on cardboard. I have seen this keyholing on paper targets on rare occasion. Usually what you will see on cardboard is that the bullet holes are somewhat oval shaped because the yaw (tumble) is just beginning when the bullet passes. I have seen near complete keyholing on cardboard a couple of times.
Wolf commerical also has the hollow cavity and it performs the same. In fact, it will do so with regularity because there is no steel penetrator, but only a lead core in the back 2/3 of the jacket, which makes it heavier in the back than military stuff, and yaws faster.