I assume anything in a 45cal size is going to be very loud, yes?
Also...why do you not recommend it for "concealed carry"?
Why are you so focused on a “loud report”?
If you aren't going to CCW then get a double action revolver with a 4" barrel even a .38 Special with +P rounds will be effective enough.
J&G Sales has lots of S&W police trade ins for less than $300.
‘The Judge’ series is BIG with the extended chambers needed for the .410 shells. The 2.5” is a possible but the bigger 3” is a bit much in my opinion.
My daughter has the 2.5 version and it would and is a good car gun but you would have to have very loose clothing to conceal it.
We have shot the smaller version outside and yes it is loud but I don’t think I would notice or care if I was in defense mode.
BTW... There is some special .410 shells with three disks and 10 ‘BB’s available. The disks hit like .38 specials except three at a time according to the reports I have read.