There is no "w" visible on any of the 20 cartridges that I can find. Their is consistent tarnishing on both the cases and projectiles. If these are in fact reloads as Paul suggested they were well done, as everything is very uniform, and quite long ago. That is very interesting information about the headstamp! I appreciate you spending the time and effort looking it up! The knowledge and kindness on this forum is absolutely amazing. I'm a student of history and love to revel in its wisdom. I'm only 30 years old (started collecting pretty young lol) and am really trying to keep the traditions of these rifles alive. If these things could only talk and tell us where they've been :)