Keep trying different ammo, different barrels like different stuff. Mine does 1.5"-2" @100 with the AE. Also how are you shooting it? I have found Iget the most accuracy out of these by shooting them off the magazine with nothing touching the forend. I hold the top of the magazine with the support hand.
I shoot with a support under the forend as close as possible to the magwell. I don't agree with shooting off the magazine since it creates forces against the mag catch during recoil. I think this may eventually wear out the retailing lip on the mag or eventually damage the magazine catch. I know lots of people do this and have no problems but that's my opinion about it and I'm not going to start doing it. I have tried it once since getting the rifle just to see if it improved the groups and POI shift but the groups were the same as supporting it just in front of the magwell.


















































