I worked at a Trauma Center as security. We had one case of a "gentleman" brought into our ED by ambulance. He had been shot by a person unknown with a pistol, though he swore up and down he had not been shot. The entry hole was approximately three inches below his left nipple and the projectile was resting just underneath the skin of his back, it appeared the projectile had passed straight through. I was involved initially because security would secure the ambulance bay for trauma alert patients and escort the patient into the trauma room in case they became combative.
The local police department had found a .380 acp shell casing on the scene of the shooting, but no shooter or gun was present. I was asked by one of the doctors to take a look at the x-ray to see if I could identify the round in question after I mentioned that .380 acp FMJ very often had a flat meplat on the nose of the projectile. The x-ray did indeed show what appeared to be a .380 acp bullet in the patient, but the patient refused to have it removed, refused all further medical care, and decided to leave the hospital AMA (against medical advice) within about 30 minutes of his arrival. On the way out he was verbally abusive towards the staff, threw a box of masks at a male nurse and attempted to attack him before I physically restrained the patient and escorted him out the door. I do not know the outcome for that patient, but I never heard of him being found dead later, so I assume he survived with no medical treatment for a gunshot wound to the high center chest besides a dressing taped in place and a couple x-rays.
After that incident I have a very low faith in .380 acp to disable an attacker, though I figure it is better then foul language.