Lee Precision will also make custom sizer dies that fit a standard 7/8x14 loading press. They come with a plunger that fits onto the press's shell holder groove. Bullets (lubed) are pushed up through the die.
We have used these dies for sizing down jacketed bullets as well, such as .375's sized for 9.3's, .323's to large groove diameter .303's(.315"), and .338's down to .300" for 8x56 Styer straight-pulls.