Progressive loaders
I started on an RCBS Jr. single stage press, and used it exclusively for many years. I still use it for loading rifle rounds, mainly .223 for my AR. I purchased a Dillon 550B about 6 or 7 years ago, and use it only for handgun reloading. Once set up for the caliber and load you want, you can crank them out pretty much as fast as you can put in another case and bullet, and pull the handle. However, I don't try to set any speed records with it. I ALWAYS check to see if THERE IS POWDER in the case as it is indexed from the charging station and is on it's way to the bullet seating station.
I still like to use it as a single stage loader when working up loads that are near maximum. Maybe I'm overly cautious, but I like to measure each powder charge when doing this, especially if I'm loading flake or extruded powder.
You can realize enough increase in production, and still be safe without getting into too much of a hurry. Safety should be your most important consideration when handloading. We get enough bad press already without someone "blowing their hands off" by careless use of firearms.