I found this at a known civil war spot on a river so that might be why it is not white. I have found bullets there that are not white eather. I am not an expert on bullets but I am not sure if it is a civil war bullet or not any help would be appreciated.
Your bullet is fairly modern. Notice the crimp marks in the grove. That method of loading came after the war. I don't know modern bullets too well so I will pass to someone else to tell you what you have.
Difficult to determine caliber without specific measurements, but definitely looks modern to me. The ring is called a "cannelure" and is found on swaged bullets (rather than cast) or metal jacketed bullets and is to help hold a pistol bullet in place when the case rim is crimped. Maybe 38 special...
Vmiairpower and Duggap are correct... and, more specifically, it appears to be a fired .32-caliber ACP (Automatic Colt Pistol) bullet, first introduced in 1899 and still in use today. Your .32 ACP bullet being made of lead without a metal jacket suggests it was probably manufactured sometime in the first half of the 20th Century.