Not sure if you meant one caliber for both or a caliber for each. If it was one caliber for both I think I would take my 30-06. Otherwise for elk I always pick my 7mm. For deer I always pick up my 25-06. I absolutely love that rifle and caliber. I love my 30-30 for deer also just cause lever actions are so cool but I sometimes have a little longer shot that I just wouldnt feel comfortable with the 30-30. Although the Hornady lever action ammo has changed that up a bit. Couldn't realy comment on bear as I havn't hunted them yet.