I have an old 700 long action in .30-06 that has been collecting dust since I replaced it a while back with a custom .308. I was thinking of making a project out of it and putting it in a new stock and definitely a new barrel. My question is, what cartridges should I consider (other than .30-06)? Also, what is the largest cartridge I could use with this action? 300 win mag, 300 rem ultra mag? Or are those too big for the standard Remington 700 long action? Thanks for your help, everybody! This is the first forum I've joined and have had some great results!