Non veni pacem mittere, sed gladium.
That's a boat tail MILITARY sniper bullet! LUCKY BOY!---Ray
It has to be a ricochet or a long spent round.
I got that off a Russian language tumblr, and the only word describing the picture was "Donbass," which is where there is a rebellion going on. It may well be a sniper round.
Shouldn't there be lands and grooves visible?