Thanks for the reply, any idea how much they might be worth? I am aware they are collectible only. I picked one up at a gun show a month ago, so if the two people from the other thread I found on the web still have theirs, then we know there are at least 4 out there. Makes me wonder how many cases were produced since the info I have found said 202 projectiles were fired during testing. Did they use new cases for each firing or reload, and what was done with the cases at the end of testing/the project?