I see there’s a few of tnoutdoors9’s videos posted in this thread. A few years ago I watched and collected the data from all his vids. I’ll post his data below. I must say up until 12-15 yrs ago I would only carry 45 acp. I have owned and handloaded for all the calibers listed except the .357Sig. I’ve been a handgun hunter since the late 70’s and love the big bores. When I averaged the data of the current factory defense loads I was surprised.

Ballistic gel with 4 layers of denim Avg. of all loads

Velocity / Penetration / Expansion

9mm- 18 loads/ 115-147gr. 1109fps. 14.21”. .625”

.357 Sig- 5 loads/ 125-147gr. 1345fps. 15.14”. .562”

.40 S&W- 10 loads/ 155-180gr. 1086fps. 14.50”. .665”

10mm- 4 loads/ 135-200gr. 1225fps. 15.40”. .684”

.45acp- 13 loads/ 185-230gr. 930fps. 13.84”. .675”

As you can see the ammo factories are producing defense rounds in all calibers to the FBI standards. It’s hard not to carry a round that offers more capacity and still pretty much does the same thing as a larger caliber. At least from the data tnoutdoors9 collected.