Hey all I have an opportunity to get a marlin 1895 45-70 guide gun that has an 18" Bbl. Now i love me a lever action especially in a 45-70 BUT...isnt that kind of a short barrel for such a round? I would think to get the minimum oomph would be around 20 inches or more. does anybody have any experience with these or have anything to say good about this rifle/barrel? Still its a sweet machine but what is the true purpose?