I have 10, of these .45 Auto cartridges that I considered to be junk. I thought they were someones idea of home made dummies. But after looking at them a little closer I have some questions. They have mixed headstamps mostly from WW1, mostly “REM-UMC 18”, or “P.C.Co 18”. They have snapped primers and fired projectiles reseated in the cases. All of the cases have a case cannelure. Just to see what was inside I pulled 2 of the bullets. I figured they were going to be just empty cases. Much to my surprise I found them to be filled with some kind of wax up to the cannelure. Then I noticed that they all of the “REM-UMC” cases have a 3 dot bullet crimps. All of these 3 dot crimps are the same distance from the case mouth and are uniformly space around the neck. Not something that was done by hand. Does anyone out there know anything about these dummies? I can and will post pictures if needed.