I agree that a hot 6.5 that fits (-ish) in a short action will be an interesting critter. Practically I don't think it will kill anything deer sized deader than the Creedmoor, and the Creedmoor already has sufficient power with those sleek 6.5 bullets to take deer at ranges way beyond the skill level of most hunters. I think for game larger than deer, most folks would prefer a larger bullet (a 7mm PRC might be pretty neat). If you want it and are rebarreling a Savage yourself, it's not like you'll have to put much skin in the game to try it out. I wouldn't count on there being brass options other than Hornady, at least for a while, but if you're ok with that, I say go for it and post up what you find.