I agree, if it chambers and it's lead - .358" or less, you're good to go.
I have shot some .358" SWC loads where you had to push them in the cylinder hard, ejected, you could see where the throats were rubbing on the bullets, making a shiny ring.
I would never use .358" jacketed bullets, they are rare anyway, but lead squeezes down by .001" pretty easy.
Considering how popular .358" lead bullets are, I'm surprised they went with such tight throats.
Anyhow, you are going to love your new gun, congrats.