Some powder, bullet, primer combinations just work, but that also depends on what you’re shooting and your barrel twist rate.
Vhitavuori powders are good and usually available.
Sierra bullets are good in several weights for a .223
Federal primers 205M are good, as are CCI 450
If you’re looking for accuracy, then it might be worth buying Lapua brass, if not, Winchester, Remington etc are fine.
As mentioned, check for consistent availability.