Years ago I used 5 grains of some sort of shotgun powder, with a round lead ball. OO? OOO? About .32 or .33, anyhow. Good squirrel load.
I got to looking some more in "Sharpe", last night. The .300 Savage case is almost identical in capacity to the .308. 20 grains of 2400 works, all the way up to 190 grains of bullet!
So, I'm gonna just set the powder measure and crank away. A tin-can load for the thrifty! (And lazy.)
Thanks, MADISON, for the link; thanks, Cape Fear, for the load.
Art