I'm a bit confused by your terminology but lead bullets for 357mag and 38spl should typically be .358"
Jacketed bullets would be .357
You should not be able to seat any/either of them by hand.
Still happily answering to the call-sign Peetza.
The problem, as you so eloquently put it, is choice.
He is no fool who gives what he can not keep to gain what he can not lose.
-Jim Eliott, paraphrasing Philip Henry.