If you have sufficient action length, magazine capacity and freebore, they will be rockets. Perform great out of my fast twist .270Win with RL26. Accurate, fast (3210 my hunting load) and great terminal performance. My rifle is rather unique being 700LA, 27" Preferred Barrel, 1:8, 0.290 freebore, 3.63" COAL so it maxes out case capacity.
I just got some 151HHT's to try and very similar in velocity.