Pretty sure they say 'a minimum of 20 lb' so if you do more its not an issue, tried doing come .308 neck sizing with a hand press, that didn't work as the arm just bent before I could apply enough pressure.
the lee decapping die is dead handy for poping out live primers as thats all its doing, not any sizing etc plus works for all cal's (within reason I guess), I've a load of PPU 38 Special ammo to pull as it won't extract so going to pull it, gently pop out the primers and see if I can re-use the whole lot in CBC brass.