Received the following from the Woodin Lab after sending Bill the photos.
[quote]This is usually an unfinished case which has gone through the loading process, either accidentally or deliberately as a joke. The ones I’ve seen are Winchester, whose manufacturing process includes a stage in which the case has a rim. For example, we have WRA 42, WRA 54, WRA 30-06, SUPERSPEED 30G.1906.
I am sending a copy of this to Frank, as he has a better knowledge of the manufacturing process, and is really the one to answer this.
Falcon suggested this in his early posting on this thread.
I have seen a number of cartridges where an unfinished case continued through the loading process. The round in this thread is interesting because the “rim” appeared to have been trimmed square, and not rounded as would be expected from the heading process. Perhaps Winchester was using some sort of two stage trimming process.