New Tikka barrel, cut to 20", my best 3 data points:
Max pressure handloads with 153 gr TMK: 2750 fps (I'd need to back-off a little).
Factory Federal 140 gr Tipped Fusion: 2840 fps
Factory Winchester 142 gr Nosler ABLR: 2885 fps
I plan to handload 143 gr ELD-X and finish the 153 gr TMK load next winter/spring. I'll need to get near 2900 to beat those factory offerings. I think it will. This season I plan to compare terminal performance between the two factory loads listed above. I'm super interested in the 142 ABLR, that Winchester load seems great.
I believe my barrel is considered average to slow for 6.5 PRC. Accurate though.