anyone tinkering with this one yet?(long gun or short one)im curious about this round,i researched it and chuck hawks site has info on it that claims jack o'connor was going for a 7x57 mauser case necked up to a 338.he calls it the 338x57 o'connor.with the market being flooded with new whiz-bang magnums in the past its kinda scary for a "usable"cartridge to be introduced...jim257