The 7mm-08 is a very efficient cartridge. 120 grain bullets over 3000 fps and 140s just over 2800, and 160s just under 2700 are the norm for 22 inch barrels in the 7mm-08. I can't tell the differnce in the field or range between my .270 and my 7mm-08. I load 140s to just over 2900 with H-4831 in the .270 and 140/139s to 2800 with Varget in the 7mm-08.
Velocity retained at 400 yds for a 270 win, 270 wsm, 7-08 with 130 (both 270s) and 140 core-lokts (7mm) is 2022, 2198, 1988 fps respectively as published by Remington. For comparison, a 150 rnsp from a 30-30 has 1973 fps at 100 yards and if you cant kill a deer at 100 yards with a 30-30, the fault is not the caliber.
I think a BLR lightweight in 7mm-08 would be a a very nice, easy to shoot rifle whose only real disadvantage to a 270 win would be ammo availability in the boondocks.
