Theee ringer?

[chiefleef]

Is this a three ringer?

 

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[Icewing]

Is it lead?

 

[P.ALLEN]

whatever it is, it hit something solid that gave it a good bruisin'.

 

[chiefleef]

Yes it is lead

 

[TheCannonballGuy]

It definitely is not the version of civil war Minie-bullet which most diggers and collectors call a "3-ringer."

Your fired bullet is a post-civil-war design, having a short blunt nose and three wide, deep, flat-bottomed body grooves. Although they resemble rings, they are not raised above the bullet's main body. The grooves (recesses) make them appear to be rings. The first bullet which comes to mind for having that shape is the 1870s US .45-70 Springfield "Government Rifle" bullet. The photo below shows a couple of fired ones which have much less damage than yours. The short-nosed 405 grain version seems closest to yours.

All of that being said, there are other ID possibilities for your bullet. I just suggested a .45-70 because your bullet seems to be approximately that size, and it has the .45-70's distinctive grooves/"rings."