I am a full-time judge in our state's district court. My decisions often upset folks. They don't like being put in jail, and they don't like their kinfolk being put in jail.
I walk through same parking lot each day at 5:00 PM. My most likely unwanted scenario is a bad guy, lying in wait, who is pissed and is going to even the score with me. I will likely be on my own for a couple minutes until law enforcement arrives to assist. I have no idea how many rounds I'm statistically likely going to need, so I carry a G19 and a spare magazine. I can't disagree that I probably won't ever need the spare magazine, but I feel better having it along.
On weekends, I often don't care the spare. On my "cheat days" I carry a Kahr PM9 (7+1) plus a spare 6 round mag.
