Karl , Hello, I will chime in on the .223 question. I've had a couple in the past. All these w/1 in 12" twist. They're are gone now as .22 Hornet & K-Hornet do that work now. Only a Savage rifle here in .223(1 in 9). But I would look hard at a barrel w/ 1 in 8 twist to take advantage of the great new heavy/longer bullets. This twist still handles 50-55 gr. fine though. Just a thought. Don't remember "xactly" how much TC setups I had ,but it was 6(8?) frames & 18(?)barrels. And this was before Encores!!Oh .223 is really best in 14 ,15 or 16" efficiency wise.