I have one, it works fine for me, and I can verify it uses std
Lyman dies and top punches. Handle is weak, have to take it easy on the
old girl. I always thought my Lyman 450 had flimsy linkage, comparing it
to my RCBS (near clone), but once I got the 45, I saw that the 450 was
a lot stronger than the 45 - and RCBS came along later (I assume) and made theirs
even stronger. Is the 4500 linkage upgraded from the 450?