Smack, I think your wrong or maybe just jumping the gun a little. I bought a Rem PSS last summer and due to working 7 days a week I didn't get a whole lot of time to fool with it. I did play with AA2520, which there is no load data for, but I got 115 SMKs in the low 2800's and pretty good accuracy. Now this was with Rem brass which uses large rifle primers and I couldn't understand why they would use LR primers in a case this small. I bought some SSA small primered brass to play with now, but that's got to wait till it warms up some.
There was a good article by Layne Simpson(hope I spelled his name right) in Shooting Times not to long ago and he shot a caribou with the 6.8. I think you gotta give it more time and see what happens.
Tom