Look like modern bullets. I shoot a black powder cartridge rifle and those look like modern "grease grove" bullets that I shoot.
That's them!! The casings don't have any letters or numbers that I Can see but I must have over 30 of these. I was guessing the casings were about the size of 45/70 but without any indicators I couldn't tell. These were found at a site where the army was still fighting the "indian wars" out here in Montana. Thank you for the ID! As far as them all being stepped on, I have a few that look like they might still look like bullets and avoided stepping on LOL
I meant were the casings stepped on. The Secretary of War issued a statement saying the casing should be destroyed so the indians could not reload them.
Also you possibly have two different sizes as I do the 405 grain and the 500 grain. The 500 grain was found to be a more accurate and effective bullet.