I ended up mounting a Nightforce scope on the ACR and took it back to the range to do some accuracy testing with 3 other kinds of ammo. I didn't bother to do a good zero on the scope just on the paper to compare group size. The results are much better (Except the Georgia Arms) but I am still not excited about them. The best group is a bit over 3 inches at 100 yards and that is with hand loads. Am I being unreasonable expecting better out of a $2400 rifle?
Here is the real kicker, and it has to do with that Georgia Arms ammo again. The gun started running away on me. On several occasions it would fire between 2 and 3 rounds. That is why the GA target only has 9 rounds in it. It was hard to count how many extra rounds were fired when the gun would run away, so I was not sure how many more to shoot at it. It did this 3 times during the 10
9 shot string. The gun also fired two rounds one time when closing the bolt! This did not happen with any of the other brands of ammo but it still concerns me, I can't have the gun firing after hitting the bolt release.
I also had one FTE with the Wolf ammo but used a different mag and had no issues with the bolt not locking back or mag falling out.
I think I am going to contact Bushmaster at this point, I just hate the idea of sending the gun back it is such a PITA.
Top Left: Georgia Arms
Top Right: Wolf Military Clasic
Bottom Left: Hand loads a guy at work gave me
Bottom Right: Hornady 55 grn FMJ/BT