Pop gave you the best advice. Doing a barrel swap isnt huge money but youre restricted by the .473 bolthead as to what you can switch it to. And pretty much all in the .473 family will cost you about the same or more to shoot as the oughtsix. You could always have a new bolt with a .378 bolthead to support the .223 rem family but then youd be talking bigger money and it would be much cheaper to just buy a cheaper to shoot rifle.
I take it that you do not handload, so correct me if im wrong.. But if im correct then my advice to add to pops above is to go buy you a good reloading manual and read up. I recommend the Hornady 8th or the Lyman 49th, or both for that matter. And read the first 120 pages or so. Completing this task will let you know if reloading is something youd be interested in getting into. And if you do decide to take the plunge, theres tons of help here waiting for you.