Nah, with the damage it doesn't seem like the round was so severe. He definitely had a nasty headache though.

Considering how Ukraine is unfolding, a lot of UA soldiers don't really have NATO weaponry, so there's a good chance this was a soviet caliber, and would've been a considerable distance where it lost just enough power to go through

the poor sod wearing the helmet didnt shake it off thats for sure, but i dont imagine it killed 'em