I used the 55 starting back around 1985, replaced it with a Redding after 15 years.
I personally didn't like the Lyman, was hard to use the bigger stick powders. After several years there were a few "nicks" that developed on drum. Probably doesn't hurt anything tho.
The Redding I have now, which is not one of top of the line, does work much better.
I still have the Lyman 55, case trimmer w/pilots, no need for them any more.