I recently acquired (my first)double rifle. It is an August Francotte 30-06 with 25" ejector barrels weighing 8 1/4 lbs and has a claw detachable 1-4x scope with the 3 post reticle. Made in 1928. Would anyone know what loading this gun may have been regulated for? There are no markings to that effect on the barrels that I can see. I'm considering trying the Federal Fusion Lite; 170gr. semi pointed BT @ 2,000 fps. to start with. I will take this gun deer/hog hunting this fall. Also, if any of the members could estimate what the gun is worth, I would appreciate it. And, what is the purpose of the rib protusion between the muzzles? I have attached several pics; in one, it is next to a pre-war Sauer 12 ga. for comparison.