I buy factory ammo in the calibers I also reload for two reasons. First, if I'm letting someone else shoot one of my guns, particularly a newbie, I only let them shoot factory ammo. I'll risk myself with my reloads, but not someone else. Second, for testing new, new to me, or borrowed guns. I'm still working on my "arsenal" and want to see how a new gun works with factory ammo before introducing reloads and I won't risk a friend's gun with my reloads. YMMV.