)
IIRC Metro handles body armor weirdly. As in, all those pockets you see on an enemy's vest? Those aren't just for show, all that extra padding stops your bullets. So you have to aim where their uniforms are thinnest to deal max damage.
Or just shoot them in the head.
Also your "clean" bullets are also your money. You can use them for extra damage, or save them for shops. ||Save them for shops.||