A Krag repeater for either Lovell wildcat would be a thing of wonder. There is a .22 Hornet repeater down South somewhere, it was offered to me a few years ago and had been written up in American Rifleman before WWII. The conversion was accomplished by putting a Savage 23D magazine in sideways. Clever and ugly. Repeaters have been made for most cartridges with .30-40 and .30-30 head sizes. Sedgely tried .250-3000, the lug cracked but the magazine worked. I had a Sedgely .25 Remington for a while but the bore was rough so it went. There may have been other calibre repeaters I haven't encountered or read about. A Sedgely catalog would probably list them.