Sometimes you only hear the bullet land next to you, or into your face, if somebody shoots with a Mosin at you.

One time, when I got killed by 2 hackers, who were right next to me, I heard only a sound of something hitting me, even though they had AKMs or AK-101 in their hands.

I knew the sounds were glitchy before, but the weapon sounds werent like that until either 0.48 or 0.49.