I started loading with a Lee Loader.
After detonating several CCI magnum primers trying, as per instructions, to hammer them home, I purchased a Franklin Arsenal priming tool, $80 (and eventually a Lee single stage press, along with the carbide dies, another $100 or so)
Before the FA primer tool arrived, I took some heavyweight leather I had used to make a cycle seat. I cut a 4"x4" leather patch, put a hole in the center, and slid the ramming tool through it to protect my fingers in case of another detonation. My fingers, all ten of which I still had, were adequately protected from two more detonated primers.
The explosion from those primers reminded me of my youthful follies. Many of my (to be untold in the spirit of public interest) youthful misadventures were as a direct result of my limited funds.
At the ripe old age of 70, an $80 priming tool is no big deal, but at 22, 80 bucks was a week's pay as a "tree removal professional."