I think case size to bore size ratio makes a bit of difference. Compare a 22-250 with a 20" barrel to a 300 Savage with a 20" barrel. Then compare a fast burning powder to a slow burning powder in the same rifle.
I agree that it does. I have 20" barreled examples of 243s and 308s and 41 grains of 4350 in the 243 is blastier than 41 grains of 4895 in the 308.