for the kind of money involved with the Redding T7, you could buy the Forster Co-Ax and be a step ahead in the game plan. Albeit the Co-Ax is about maxed out (lengthwise) with the 300 Ultra mag. But it has more than enough power to full length size (more than the ones mentioned in the other posts).
Die wise, it's your call. I wouldn't waste my money on Redding dies. Perhaps a Lee Collet die? Buy the Forster seater (the Redding is an over priced copy and still not as good). For a full length die, the generic RCBS, Forster, etc. will do the job nicely and leave cash in your pockets. With the .223, you must either use a small base die for the AR platform. Yet if your shooting a bolt gun, then I'd go with the Lee Collet die and the Forster seater. I would add a Redding body die to the mix, assuming I was using the Lee Collet die.
The only thing better than the above without going the custom die route, is via an arbor press and Wilson inline dies. Even then your maybe looking at five or six tenths difference (TIR)
gary