We might just want to look into this to be sure that they're safe for a Krag.  Being that they are from Cowboy Action, they may be intended for "Cowboy Action Shooting" in an 1895 Winchester Lever Action, which can handle pressures in excess of what a Krag can.  Now I realize that this is just an assumption... but I would rather make an incorrect assumption and be wrong, than to not make one at all and be sorry!