Nothing wrong with either the original Winchester 95 nor the latest Japanese iteration.  Just don't expect the same slick handling you have experienced with your Krag.  Winchester also made their 1885 Single Shot in 30-40. Originals are very pricey.  Remington made the No. 3 (Hepburn) in 30-40.  Very rare and mid-to-high 4 figures in front of the decimal.  Remington also advertised their No. 5 Rolling Block, but I have never seen one.  Remington also made their Lee bolt action in 30-40.  Those are also relatively rare.  I have a Uberti "Winchester" high wall in 30-40.  It is a modern reproduction of the original Winchester 1885 rifle, made of modern steel with a bushed firing pin.  If you ever shot an original high wall, you will soon realize that the Uberti is not the real thing.  But it is close enough, safe and affordable.  Lots cheaper and easier to find than any of the originals.  I would recommend the Uberti, but that buttstock will need replacement.  Recoil hurts!   There was also a Ruger #3, but most of those have disappeared from the used gun racks.  You might find the Ruger or the Japanese 95 in the $400 to $600 range.  All the rest will cost more.