Re: savage 111 25-06
That would be a very easy conversion. All you need to do is get a 30-06 barrel, a set of go/no go guages, a barrel nut wrench, and a barrel vice. Loosen the barrel nut, remove the 25-06 barrel, install and headspace the 30-06 barrel with the guages, and re tighten the barrel nut. I would recommend upgrading your recoil lug while you have the barrel off.
If its something you not comfortable doing I'm sure you could find a gunsmith that would do it without costing you a fortune.
Ignorance can be treated with education, sadly there is no cure for stupidity.