What are your accuracy expectations from the RAR BO? I've had some ammunition that groups around MOA at 100 yds, some that's closer to 2 MOA. 300 yds with a BO, and I've had no issues ringing an 8" gong with 2 MOA ammunition at those ranges with my RAR BO with supers and subs.
Some of the best loaded ammunition I shot was remanufactured ammunition loaded with 125 gr Sierra Match King bullets. I can't remember the manufacturer, and I only purchased 100 rounds out of a LGS and I think they only did a one time purchase. 110 and 120 grain Barnes Vor-TX ammunition has been very good for me deer hunting. I consistently get MOA or better at 100 yds with it.
I also run a 7.5" AR pistol, and I'm happy if I get 2 MOA at 50 yards with a 1 MOA RDS. Optics will also play a big part in accuracy expectations. The scope on my RAR BO is the Nikon 2-7 .300 BO scope, which I actually hate.