20 years ago bought one plus extras at auction. my findings are this; Do not use ball powder, it grinds and balls and escapes. Flake powder is less messy and works well, think red dot, Unique, green dot or like that.
Shot. #2 or 4 bang and crash to load, best use fine shot, # 8 are easy or 7.5. Hummsons #8 weight is 9/10 ounce in a 7/8 bushing.
Thin hulls bend and crush easy, best are Remington green or gold sporting. Winchester AA will work, with effort.
The primer feeder is a loss cause for me, single feed.
HOW YOU do it is important. The machine works good once you employ the proper effort and practice.