223 Ackley is the bee's knees.

I have a 22" 1:7 Criterion (.061" freebore), and I get 2950fps with 80gr A-Max and 24.9gr 8208XBR, 2750fps with 90gr Berger VLD and 24.9gr Varget (both speeds 10rd average over chronograph and verified on steel at 650yd).

I use my generic AR load (23.5gr XBR under a 77gr Nosler @ 2.225" COAL) and it shoots about 3/4 MOA - good enough for fireforming brass, banging steel, dot drills, or killin' stuff.

Plus - trim brass pretty much never.