I like the Krag cartridge for cast bullets. It seems almost designed for cast with its long neck and near perfect case capacity. The '06 is also good with cast but just not quite as good. The Krag action is a work of metallic art made by artisans in metal and wood. While I do love the '03 nothing compares to the Krag for bolt action retro cool. My personal opinion is get a Krag but don't turn down a good '03 Springfield. Considering your proclivities I think you might be happier with a Krag.

Jerry Liles