Initial testing looks like 2800 is feasible, but 2900 may be tough without a 30" tube.
I have shot the 123 scenars at 2960, and they perfomed as predicted to 1180yds. Haven't gon further, or really rung it out past 1000...but to 100, it is dead predictable.
If you scroll down to June 6th entry you can see my rifle in the video...using 123Scenars in a 20mph full value wind...
BTW -- on the 1180yd shot I called it a 90% 20mph full value, and the bullet went dead center for windage...I was holding 15MOA of wind for a center hit!!