In my quest for a new, more powerful rapid fire big game rifle, an idea hit me in the head. (Oh no, here he goes again.) What about a 45-70 pump action rifle/carbine? The rimmed cartridge would work extremely well in a tube magazine like a shotgun. Heck, it could be designed off of a 410 shotgun with minor modifications for the higher stresses of the rifle caliber. What do you guys think?