A 3X9X40 would work just fine, some will say you don't need a 9 power on a 30-30 because of the limited range, But with the new ammo out for the lever action 30-30's, Hornady Leverevollution, you can get more range out of you lever action..Muzzle 2400 fps. 100yds- +3.0", 200yds 0.2", 300yds. -12.1"..not bad for a 100 yard brush gun.