How much difference is there in single stage presses?

[sxenopho]

For sizing brass, any press that has the ram travel to accomodate the brass will do.

Your Lee classic cast should outlast you.

It wasn't clear if by sizing you mean resizing or case forming. If the latter, look for a compound leverage press.

 

[ranger335v]

The tangent forces on a conventional ram and toggle system are far less than some think. At the point resistance is felt with case contact inside the die the leverage points in the toggle linkage are so nearly vertical as to be irrelivant to case alignment. And all that is beside and ignores the rather loosely fitted shell holders we use.

Meaning, no current compount toggle linkage press has any helpful case-to-die alignment advantage over any other. If another design was truly superior they would all copy it, just as they did with the compound toggle linkage system; NO ONE still makes the original simple lever-link presses they all started with!