At one point in the time line, I checked out the Dillon BL550. What was very disconcerting is there are almost no videos on YouTube of the BL550 or the 450. That spoke volumes to me and I dismissed that press from further consideration.
It may be the best one on the planet but when no one else cares to post it on YT, while 5,000 others have posted their 550b, Lee, RCBS, T-7, Co Ax and others, it makes me wonder why.
One of many, many videos.
https://www.youtube.com/watch?v=OupCjYZoCpE