Quote Originally Posted by butlersrangers View Post
The .30-40 cartridge on the left is likely Frankford Arsenal, May, 1902 production.

The .30-40 cartridge on the right is likely from the 1898 Kynoch contract.
(Possibly, you have incorrectly recorded the month/year marking)?
It is probably loaded with Cordite powder.
I was thinking the one on the right might be Kynoch but wasn't expecting the U.S. military to have a contract with Kynoch for ammo. I'ts hard to tell but that could definitely be a '98 not '88 that I'm seeing. When shaking the cartridge it doesn't quite sound like loose powder so I'm guessing it's cordite.