I don't shoot an AAC, but I do shoot a M700 5R.
What I have found as far as factory loads:
1. FGMM 175gr is the standard. It performs well, but not extraordinary.
2. Hornady Superformance 178gr BTHP rounds performed exceptionally well in my rifle. At my home elevation of 530' (DA 2350) they clocked an average of 2766 fps. I took a precision rifle class in Utah and was able to hit a target from 1450 yds on my 2nd attempt, with 1 follow-up shot to confirm with this ammo.
3. 168gr bullets are sub-par performers at extended ranges.
For handloads:
The only handloads I do for this rifle are with Berger 185gr Juggernauts. I've got my load worked up to 2600fps+. With that I usually only have to dial around 10.4 mils to reach 1000 yds, depending on the atmospherics of the day. I'm not giving my recipe for this load online, but if you do decide to work this load up, use the Berger book and go from there.