I have a Gibbs (satin nickel by the way) in 303 Brit. I do appreciate that rifle. It is a fine shooter with milsurp or commercial ammo as well. I haven't killed a critter with it, and may never, but having 10 303 rounds at my fingertips is a nice feeling.
I painted the stock on mine a stone colored texture finish....
Congrats on your find. 308 is likely a better caliber for one of these rifles, but 303 appeals to me, Rule 303 and all.....