Some kind of action dummy?
Lead Forever!
The 2nd amendment was never intended to allow private citizens to 'keep and bear arms.' If it had, there would have been wording such as 'the right of the People to keep and bear arms shall not be infringed. -Ken Konecki, July 27, 1992
John Galt was here.
"Politics is the art of postponing an answer until it is no longer relevant". (From the movie 'Red Tails')
What's the primer end look like? Does it have any kind of adjustment to it?
Primer end is just flat-- no features and no extractor groove.
Hick: Iron sights!
The linked follower of a snail drum or similar drum?
I've seen a couple of youtube videos of plastic body drums flying apart and scattering parts. An out of battery discharge might do this to an otherwise good drum.
Bingo!-- I think Multigunner got it. With that clue I looked at a few drum magazines and see something that looks just like what I found. The drum I found on line has flat-bottomed parts that look like cartridges that follow behind the loaded rounds. Thanks!
Hick: Iron sights!
BP | Bronze Point | IMR | Improved Military Rifle | PTD | Pointed |
BR | Bench Rest | M | Magnum | RN | Round Nose |
BT | Boat Tail | PL | Power-Lokt | SP | Soft Point |
C | Compressed Charge | PR | Primer | SPCL | Soft Point "Core-Lokt" |
HP | Hollow Point | PSPCL | Pointed Soft Point "Core Lokt" | C.O.L. | Cartridge Overall Length |
PSP | Pointed Soft Point | Spz | Spitzer Point | SBT | Spitzer Boat Tail |
LRN | Lead Round Nose | LWC | Lead Wad Cutter | LSWC | Lead Semi Wad Cutter |
GC | Gas Check |