How many rounds do you carry on you every day? That's how many rounds your pistol needs to shoot with no malfunctions every single time.
That sounds dumber every time you say it.
Like it or not, that's the ground floor; the starting point. The point being, the absolute minimum is really not hard to achieve.
Now more reasonably you should be able to get through every training session without a malfunction; however many rounds that may be. For some that's a pistol that goes 2,000 rounds, for others much less.
