I have dug these bullets on site of old fort - Ottoman Empire and later Austro-Hungary...
I have not seen two of them before.

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Third one is Minie ball 14mm in diameter
Second one is a bit bigger - longer than Minie ball - no rings
Both hollow

First one - on the left is a mistery
15 mm
lead - no hole ... - no rings

Probably few experimental shots...
What was the beast that fired those?
Any ideas?
I know that they are 1850s up to 1870s