To try to figure out if they are a type of bullet first you need to post accurate measurements also show a pic of the bottoms maybe at a slight angle.
The bottoms appear to have a dimple, indicating an incomplete pour.?
In that case all you have to go by is nose shape and calibur.
Im not a civil war eara bullet expert but some people here may know a bullet type that has that blunt round nose. .36 savage maybe?
For anyone who wants to regularly I.d. Bullets, buy a cheap set of calipurs.
Good measurements can tell as much or more than a picture.