I've got an 8mm-06 AI. It's as much a novelty as anything, but pretty potent. Got it for use as a backup/loaner rifle. Just a rechambered Mauser 98 8x57. So, if you're building from the ground up, .338-06 is probably the way to go due to bullet selection. However, a 200 grain Partition from an 8-06 (AI or not) is more than enough for literally anything in North America and it's easy to do on a Mauser. But if going for a more expensive build, go with the .338-06. Whole gun cost me $225 FWIW.
