311284's and 311299's are teriffic.  Load them as fat as you can so as to fill the generous throat on the krag. I'm not recommending it but I load them with 17 grains of 2400 and my Krags will do what modern rifles will do. I use White Label's BAC lube, gaschecks and size them .312. I use a neck sizing stem from a 303 die.