I was only suggesting that potential hearing loss be one of the considerations when choosing a carry weapon. The April 11, 1986 shootout in Pinecrest, Fla was a game changer in LE carry caliber. The FBI first switched to the 10mm and later evolved to the .40 S&W and some agencies now carry the .357 Sig. Any card carrying Wyatt Earp wannabe can pack a .460 Rowland if he likes but it is hard to imagine a civilian scenario where anything more than a 9mm or .45 ACP is necessary for effective self-defense; especially given the improvement in today's ammunition.
These are good insights from the sageful tracker.
I will say that a .45 out of a short barrel (XDS) is startlingly loud with quite the shocking BOOM.
Also, if in bear country I don't think I will downsize to protect hearing in the event some very rare attack were to ensue. Much the same, i find it a rare instance I'm ccw'ing for so I don't want to be too puny there either. I'm not saying 9, 380, 32, 22 or 25 is too puny, but each caliber is for each person to decide for each day in each given situation one were to find oneself in. Wow, it's awesome to be an American. Just one small example ; )
Anyway your points are great to consider in the whole of caliber selection. Thanks Tracker.