I tried that one time. Between "Whatcha doin'?", "You're gonna blow up your gun!" and "That ain't the right powder" folks hangin' around, distracting me and irritating me, I decided the best thing for me was to just load enough at the house.
I started with a Lee Loader way back when, but have since sold or traded them off. I do have a hand press in one of my cabinets. Every now and then, I want to do something that doesn't require a bench mounted press or add some extra step like factory crimping. It comes in right handy for that.