Oh FFS! Have you actually used a Lee Hand Press? Lube the case and FL size the dang thing. I have FL sized .30-06 brass with mine as well as .303Br. Can't prove it right now since I am in Tampa and not home. But when I get home in a month, I will definitely make a video. It's NOT THAT DIFFICUT! And I'm old, fat, and out of shape.BTW.......good luck trying to resize a 762x54R with a hand held press....unless you look like Brock Lesnar.
If you want to do a full length resize you will need a bench model press.
If you want a hand held tool then you are going to be neck sizing to .308

I would imagine using your knees/thighs when using the hand press would be a big help keeping everything from falling all over?
here is another thought
have you tried to size a case without the expander rod?
I deprime my cases with a universal decapper, or Lee hand tool.
but due to the limited leverage on those tools, perhaps your dies size the necks just enough that you don't need to expand... just chamfer the inside neck, and seat a bullet?
just thinking out loud here, trying to make life easy



























