Here is a post from bamaranger over in the reloading section.
Today, I set the chrono up outdoors and brought the Rem 700/.270 out with my "pet" load, a 110 Sierra and 55.3 grs of IMR4350. The Sierra Manual listed it a 3200 +, I expected 3100+, and felt CERTAIN I would break 3000 easily, which was the object of the light bullet load. Did not feel I could get 3000 fps from the 22" tube with a 130 gr slug.
So I wonder just how far behind the 6.8 is behind the 270?
I had the same results with the 270 and some of the powders available back in the 59s and 60s.
I am over 70 so I don't get out like I used to and the wife wont let me go alone
6.8 might be a fun ticket!