In a previous post I asked about 38-56 for a new rifle and several recommended the 38-50 remington as being a better choice. I looked it up in Manula for cartridge conversions and it is interesting. The book lists 303 British cases for conversion. What cases are you guys using this cartridge using for conversion? It looks like 30-40 krag and 405 win could also be used to form them. Do you turn the rims down as the book says or have the rim cut out opened for the new cases rim? How is brass life with the reformed brass and BP loads? Im having a rough time finding the 303 cases in any quanity also.