I have had one in mind for years. Not going to chop up an original or even an existing sporter with a good bore. Plan follows:

-Find Krag reciever already D&T for reciever sight or sporter with ruined bore

-Rebarrel to make a "Big Bore Krag"; short list of calibers: .35WCF, .35/.375/.400 Krag (wildcat based on .30-40), or .444 Marlin. All these would work through the magazine with little if any alteration.

-Stock in pre-Depression era idiom; Griffin and Howe or the Krag I have seen attributed to COL Whelen.

The floor is open for input/discussion/suggestions. Been thinking about this for 20+ years.