Yes, in a superbly accurate .280AI WBY MK V Ultralite (rechambered from factory .280 R.E.M.). The .284 140gr TTSX left that skinny 24" factory barrel at 3220 fps and grouped way sub min. out to 800 yes. That being said, I personally would limit it to 500 or so, as it is slowing down pretty quickly out past that (BC sucks). The on game performance on elk was more than adequate though.