I'm fairly confident I could make 2800 fps with a 180 grain bullet, in the .308 Winchester. You would, however, have to beat the bolt open with a large mallet
Seriously, I do have a safe load that will propell a 180 gr. Speer Grand Slam at 2760 out of my 24" Shilen .308 barrel. I use WW748 and Winchester Brass.