I would like to thank everybody for their comments and suggestions. The winner is 35 Whelen. This fills a caliber gap in my collection, will fit the rifle without any modifications, is a somewhat classic cartridge, and I found 100 rounds of factory ammo to get started with. Ordered a nice 24" fluted stainless steel heavy sporter barrel blank. I will send the action out to be hard chrome plated. Makes things very slick and rust proof. It will probably take close to a year to be finished.