As I posted above part of the leverage disadvantage is the mounting height of the press. (36" bench in my case) That coupled with my short frame, and the high above bench lever fulcrum, means that I can't lean on the lever with anything like I can putting my weight down on the Rockchucker handle.
The press works well once you get the looseness figured out: the bolts holding the ram to the upper and lower castings work loose and really effect leverage. Stabilize them
and the two guide bolts/nuts that run in the back groove of the ram with blue loctite.
The press has its niches, but I don't think it is sizing Weatherby Magnums. I wouldn't use it as an only press unless I only loaded small cases. Again, it doesn't replace a good heavy duty "D" press, but it compliments one quite well.