The 223 is an excellent round in the TC. I have a good factory barrel in Super 14 that averages high 5s, and is getting better with tuning. I bought a great Bower Rest that is fantastic, and I have a forend and grip that Denzel Roberts made me out of Maple that contrasts nicely with the walnut Bower Rest. I am shooting Hornady 53 HP Matches with 332 getting this result, and am considering better bullets to shave off a couple of tenths. Try replacing your trigger return spring with something lighter if you find the trigger a little heavy, but the factory triggers on the pre g2s are pretty good.
Try a 7x30 Waters, a .17 something, and 45 ML. They are all a blast, pun intended :-)