I just got the Rem 700 AAC-SD, havent gotten a scope for it yet so load development will have to be after deer season.
I use a 300Win Mag for Fclass. Its a Savage 110 action, Savage 112 barrel. In a Choate Ultimate Sniper stock with a Rifle Basix trigger, EGW 20MOA base, TPS rings, Millett LRS scope. I have $675 in the whole thing and it shoots 1.5" groups at 600yds with 210Gr Bergers.
Ill report back when i get the Rem 700 AAC-SD up and goin. Cant wait to use it in Fclass. That 300wm is a powder hog, takes just over 1 pound of powder to load 100rds.