I must first acknowledge my bias regarding the 9mm cartridge.
I have carried (and will continue to carry the 45 ACP as my duty sidearm) for years.
I saw, back in the day, how the 9mm did not meet expectations. Now these are my observations only.
I have been reading articles, and have spoken with trauma surgeons I know, including two as tactical medics with a SWAT unit. They advised similar information regarding improvements with the 9mm cartridge and ballistic data.
Sooooooo, I have been looking for a solid addition in that caliber.
I believe I have achieved my quest (for the moment) in the 5903 I located in a pawn shop today.
Very clean, one magazine, serial number indicates 1991 manufacture date.
Looking forward to range time. Don’t know if I will qualify with it but I am excited to have another 3rd generation S&W.
My first (and favorite) is my 4506, a previous duty sidearm.
So I stay a committed 45 guy, but I will always be willing to expand my base of information.