Here is info from Sierra, just click on the link,
http://accurateshooter.net/Downloads/sierra223ar.pdf
Here is some info from accurate shooter.com
H322 25.3 Rem 7.5 40 Sierra BlitzK 3200 fps Sierra's Accuracy Load for AR15s. Try 28.4 gr H335 for 3500 fps.
Benchmark 25.5 WSR 50
V-Max 3307 fps Loads great in a Dillon. Used last summer to hunt prairie dogs.
H4895 26.5 WSR 50
V-Max 3341 fps Graymist's favorite 50gr load. Has worked in every 223 he has owned. Also work with Nosler BT and Sierra BlitzKing.
Reloader 10X 23.5 WSR 50
V-Max 3127 fps A great load with a new powder. Close to book max.
VV N133 26.2 CCI BR4 50 Speer TNT 3398 fps Vihtavuori MAX load for BOLT GUN, 2.244" COAL. Very Accurate.
Win 748 26.5 Rem 7.5 52 Sierra BT MK 3000 fps Reliable, moderate pressure AR15 "short line" load for service rifle comps.
H335 25.5 WSR 53 Sierra HPFB 3153 fps A good practical BOLT GUN load. Loads great in the Dillon.
VV N133 23.5 Rem 7.5 53 Sierra FB MK 2900 fps Sierra "Accuracy Load" for AR15s.
BLC-2 27.5 CCI 400 55 Speer SP 3313 fps Hodgdon MAX load for BOLT GUN. Meters great.
AA 2015 23.2 Rem 7.5 60 Sierra FBHP 3000 fps Sierra "Accuracy Load" for BOLT GUNS.
H4895 25.0 Fed 205M 60 V-Max 3008 fps Graymist's favorite 60gr AR15 load. Super Accurate. Good choice for groundhogs.
VV N540 26.2 CCI 400 69 Lapua Scenar 3179 fps Vihtavuori's MAX load for BOLT GUN. Start at 24.2.
AA 2520 26.0 Rem 7.5 69 Sierra MK 3000 fps AR-friendly load. Very Accurate. Watch for powder lot variations though.
H4895 24.5 Rem 7.5 75 JLK VLD 2905 fps Hodgdon MAX load for BOLT GUN. Too hot for AR15.
Reloader
15 24.1 Rem 7.5 77 Sierra MK 2600 fps Close to a "standard" load for AR15 long range matches. You can substitute 23.9 Varget.
VV N140 23.5 Rem 7.5 80 Sierra MK 2550 fps Sierra MAX "Accuracy Load" for AR15s. RL15 is good for 2600+
Varget 24.4 Rem 7.5 80 Sierra MK 2800 fps Sierra "Accuracy Load" for BOLT GUNS.