.45 ACP would work ...
But the center punch won’t blow out your eardrums ...
Good “point”....
Always store a pack of foam ear protectors with your firearm. My husband has a small capsule on his key-chain with a set of those in it. They do not take up much room and can actually be squished down in your gun holster. Those may not provide full ear protection but would be better than nothing at all.
Hubby and I will be watching a movie in which a shoot-out happens in an enclosed space and we are both noting that everyone’s hearing is now non-existent so there is no way they could be having a whispered conversation after such a round of gun-fire.