) Of all the press types, manually indexed progressive presses are the easiest to make bad rounds.
Many moons ago I used Mec shotshell loaders. I bought a manually turned progressive Mec 650. I was either dislexic or an idiot(be nice)...Never could get proficient with that thing. Within 5 minutes I would have shot powder and other stuff running all over the bench. First P-W 800 I saw I bought.. Still have that 650. Haven't even set it up since the 60s. Think I keep it to remind myself not to try it ever again