Researcher, correct me on this if I am wrong. Were not many of the NPE cases purchased by small loading companies who then loaded them for sale. In one sense this could be referred to as "Factory Loaded", just not by UMC themselves.
It could likewise of course have been loaded by an individual handloader. Whoever loaded it had a neat tool to roll that crimp into the slugs groove. I would venture it was not just a run of the mill home loader, but a rather advanced one if it was not done by one of the loading companies.
