After perusing the readily available load data on the net (Nosler, Hodgdon, etc.) it looks like all .358 Winchester loads were designed around lever guns @ 52k PSI or so. If the .308 Winchester is rated to 62k PSI then is there any reasonable objection to loading the .358 Winchester to a similar level (60k PSI +) if I intend to use it in a modern bolt action?

I have a feeling I will run out of case capacity with powders like Varget and H4895 before I get into dangerous territory.