Im not expert but i have a hearing loss and ill so my best to help the best i can. So your right you don't have to worry about your hearing, you have the luxury of losing it and not have any definite loss. One possible example i can think of that you have is tinnitus. It is a ringing in the ears and can be permeant depend on how loud the experience was. So you shooting a 9 mm handgun would be louder than the 380 handgun. If this is the first time shoot it should that you should be ok