I switched over all my .223 match ammo from to Alliant AR-COMP a couple years ago. I've been very pleased with it, but I've found it to be a very dirty powder. I'm getting more velocity using smaller powder charges with AR-COMP over Varget.
I'm using it with Sierra 77gr MK and Berger 82gr MT bullets, which are a bit heavier than your selection. I run 22.4gr for the 77gr and 23.3 for the 82gr, both using CCI450 primers. Velocity is around 2680 - 2700 fps from a 20" barrel, 1-7.7 twist. WARNING - 23.3 is a *warm* load and I use a carrier weight.
I have heard some complaints from folks about cycling issues with AR-COMP and a buddy of mine had the same issue a couple weeks ago while developing some loads for NRA/CMP matches. The only thing we could pin it down to was that he was running a small rifle primer and I was running a magnum primer. Using identical bullets, brass & powder charges, my loads worked & his wouldn't reliably cycle the action.
EDIT - here's a group using AR-COMP. 10 rounds @ 100 yards; off the bench with iron sights. Just over 1MOA
