I can't see that on my phone, But that's cool.It looks like a dropped short Whitworth (Confederate sniper rifle round) which would make it a pretty rare and very special (as well as valuable) find. If you have or can find a set of micrometers or digital calipers it would help nail down the ID, but I don't think there were any hexagonal bullets except for the Whitworths. Super find. Did you dig it yourself? If so, wherever you dug it needs to be hit and hit hard.
I can't see that on my phone, But that's cool.
P.S. I'm laying by the pool and the sun's in my eyes. LOL
HH, Relic Nut
I believe it's a .577 Enfield Bullet. Came up as a penny. I mainly coin shoot and then this pops out. Hah!