Go 1/8 twist on a Rock #3 or #4 fluted at 24". You can easily
get 3,000 fps with 140's. That would be my target speed for a hunting rifle.
I run 130 Swifts at 3,050 out of my 22" 6.5x284.
McEdge stock all the way. Don't mess with the BC, been down that road.
