spider65, When I read a nonresponsive reply to a thread, I sometimes wonder what the writer is thinking. Well, I shall do it here. Despite your qualification concerning NO action modification, I offer the following thoughts.
You might wish to consider the 9.3 x 62 Mauser cartridge. For over a hundred years it has enjoyed a positive reputation and popularity across much of the world. It not only lives on today, but has gained a considerable stateside repotation and competes well as a compact 375 class contender. At overall 3.29 length, the round is usually a trifle too long for the unmodified M98 action. Possibly worth considering it in the context of a modern aftermarket magazine trigger guard assembly featuring the quick release hinged floorplate feature. At least within the last few years, these were available new and in all steel construction for the standard 98 action in 30-06 case length. The price was just under $100 from eBay sellers. Such would nicely accommodate the 9.3 x 62 and likely require a bit of receiver modification though nothing extensive. Your bolt face should be .470 and accommodate the 9.3x62 round without modification. Giver a decent quality action, properly accomplished, the result would likely offer a superior investment return.
Pardon the violation of your parameters but just a thought and...