I didn't reload when I got into buying these guns and thought nothing of it......just buy ammo and shoot !! Well it sometimes doesn't go the way we plan. Or maybe I just wanted too much.
Anyway my 243 shot most all boxed ammo into a large group, the exception was Hornady 75gr hp those shot well as long as I didn't clean the barrel after any range time. My experience with 6 different barrels I've had......leave them fouled!!
Now I reload and have a good thing going with Hornady 87 gr bullets,, any of the 3 styles will shoot point of aim at 100 yds. And I don't clean the bore anymore.
But for what you're asking,, if I were you,, get the 223 and add barrels later.