I have a Lee Turret press, and just bought a set of Hornaday 300 RUM dies. They don't come with the shell holder though. Lee doesn't list 300 RUM dies on their website. Does anybody know where I can buy a shellholder for a 300 RUM, that fits a Lee press? Do all brands of presses take the same shell holder? (will a shell holder for a RCBS fit a Lee in other words) thanks!