When i went to a Sig P365x because it's 12-rd flush magazines allow pocket carry, I was completely comfortable with that. If i can't solve a confrontation with 12 rounds of LE 147gr HST, I usually have 2 spare magazines with 11 rounds loaded, yes, 11, not 12. If you do a tactical or "Executive" reload (done with a round in the chamber) it's far easier to insert and lock the magazine, Sig P365x magazines are VERY tight when fully loaded, I'd rather have it lock easily rather than risk having it drop. Average of rounds exchanged in a confrontation (statistically) is 3.2, so with 12 initially, I'm comfortable.