The average SD incident statistically averages 2-3 rounds fired... practice often and make them count.
Since the, 'average', person doesn't see the need to CCW at all, than why bother carrying anything more than 1 round much less the gun? I'll pass along that, "...average SD incident..."
statictic to the city work crews whom wash-off hundreds of Gang tags on a daily basis. I'll let the women in San Jose, CA, know that the 2 hold-up bandits she took care of, with the help of Mr. Glock, fell into the statical norm; unlike the other women whom was repeated raped by a gang of 6 to 9 men in Richmond, CA.
Some leave home armed with statical averages, and some leave with a pair of non-average reloads.