The 45-70 is one of the most successful cartridges ever designed, and
has been in use for well over 100 years. As one of a few different
calibers used in the popular Gatling guns, there were a few blanks
produced in that long ago era for that specific firearm .
These distinctive brass cases are in the shape of a loaded cartridge,
to perform better in the gatling gun versus the straight blanks which
were produced for  regular 45-70 rifles.
A scarce item today.
45-70 Gatling Blank
$ 14.75  per Cartridge
Remington/Union Metallic, with "REM-UMC" Raised Head
If you wish to have deactivated, it must be drilled.