Oversized bullets don't necessarily raise pressure all that much. There have been several reports of folks using .357 jacketed bullets in 357sig (spec is .355) with no trouble whatsoever.
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.