My 45 is very loud but my .357 mag will do that to you with your ear protection on. I like to shoot it at the range just to watch everyone lay down their guns and look to see who brought the hand cannon. LOL.(my .357 Rossie is too big/long/heavy to carry anyway)
But seriously You have to be able to hear when in combat of any kind, so you just might have ringing for a couple a days its better than a coffin. I think You need to hear your gun shoot without ear protection so you are not freaked by how loud it is and get distracted when you do have to shoot. Of course that is not in a closed range, but outside in the open air with no one else shooting, so you can know what to expect. Shooting at indoor range without ear protection can really hurt you, as you found out. Shooting indoors is always going to be louder, So remember that if you have to get up in the middle of the night and protect your home, that any shot is going to be louder than probably anything you have ever heard, be ready and don't drop your weapon.
CrowSnake
CCW Holder Mo. - NRA - USCCA - HOG
.45 Taurus Millennium Pro PT 145 - Ruger LCP .380