BTW, to come to the conclusion that the 457 would be my regular carry gun involved A LOT of shooting of multiple pistols.
4566, 4563, 3913, 3914NL, CS9, CS45, G36, PPS, 365, Hellcat, 4516, 5903, G43, HK VP9SK, USP 45c, HK45c, Dan Wesson CCO 45, G30S and 4013TSW.
The majority of those were tested moving and shooting at the Police range. Drawing from concealment and firing on a timer. And shooting drills. A few were shot only on the indoor public "square" range. But were run through drills as well. 5x5x5, HR, Mozambique ect.
The goal was to see what I could get fast accurate hits with and yet carry comfortably and "live with" easily. I am semi retired and looking at full retirement in the near future. While I won't be "required" to be armed any longer, I intend to be. And I will pick up more hours instructing as well as working at the local range.
As my friend Fastbolt pointed out, aging and the accumulation of injuries has made the carrying of larger heavy combat pistols, less attractive, to me, than when I was younger, skinnier and in better shape. And while I am a card carrying member of the shot placement club, I wanted a 45. Just a mental thing based on personal observations, experience and my ability to still control and shoot one well. When the day comes that I can no longer do that, I will go to a 9mm.
Anyways, the 457 is what met all my criteria. Carries easily, for 12 or 22 hours. Low maintanance. Bet your life reliable. Pretty accurate and able to place A hits under speed and pressure. Gods caliber and thin and light. Everything you need in a 45 carry gun. And nothing you don't.

Regards 18DAI