Hello Ace!
I would go with mainly RCBS reloading equipment, it is solid, well made stuff and will last a lifetime. I like Redding dies and I use a PACT digital scale. But my press, powder measure, case trimmer and other case maintenance equipment is RCBS.
A good long range load for my .223 consists of Hodgdon Varget powder and a 50 gr. Nosler Ballistic Tip bullet. I have shot this load out to 500 yds. and have found it to be very accurate. It is capable of grouping less than 1/2" at 100 yds. You can find this load listed in the Nosler reloading manual. Good luck!