Pretty self explanatory. How many hollow points do you run through your gun to test reliability? I run 100 at a minimum (typically 150-250) to verify reliability in my auto loaders. In a revolver it has been as few as 20, mostly checking for crimp jump in the lightweight snubs.
I know several people that only run 1 magazine of hollow points and call it good. I couldn't possibly feel confident in my defensive ammo/gun with so few rounds tested.
I pretty much buy second hand guns in very good shape. Last purchase was Glock with free yet fully functional night sights. I took box of my beloved 150gr HRT loads and had salesperson run couple magazines through the gun. The gun passed and is ready to serve as personal protection arm. Saves me time plus $20 range fee.