I have a 30 Army which is completely nickel plated except for about 1/8 inch on the bullet tip (please see photos below). It looks like a bona fide Frankford made cartridge to me and has no signs of being tampered with. The 3-element headstamp (F 4 01) is also correct for this time period.
It isn’t the usual dull grey tinned case but is actually shiny like chrome. I looked through HWS Vol. 1 and noted nothing to indicate what this cartridge might be unless I missed something. A reduced range cartridge was mentioned as being nickel plated, but only the first half of the case.
Has anybody seen a similar cartridge or have one in their collection? Is it possible this is some type of drill, function test, dummy, or display type cartridge?
I would appreciate any information or opinions as to what this cartridge might be. Thank you for your time to read this post.