For some reason, every time I shoot someone's head even with a shotgun in front of their eyes, the head doesn't explode.
It's freaking weird that pistol shots blow off heads every time, yet shotguns or some ridiculously powerful gunshots to the head never trigger gory explosion(they take off small chunk of head instead).
Besides head explosions(?), limb mutilations are very hard to trigger with firearms and it seems I can do it only once per enemy. If I blow off one arm with a gun I can't dismember other limbs, whereas it's fairly easy to stack dismemberment with blades. Also, corpses in general can't be dismembered further most of the times.
I reckon there's some fundamental coding issues with dismemberment in CP2077.