[QUOTE=Rick Losey;170295]the chambers on this gun have the abrupt rim
If it was chambered for one-piece metallic cartridges with the chamber cut for the length of the cartridge with no cone at all.... I'd guess there is an error in the book. Suggest you ask our research chairman to go over it again to determine if a mistake was made in the research letter or if in fact the letter is accurate according to the information available.