It is another fired civil war .44 revolver bullet. Again, most of its identification characteristics have been morphed by firing... and also by "slight" impact when it "ran out of gas" and plopped semi-gently into the ground. But I can see just enough (the lower 3/16" of its sides are slightly tapered), and in combination with your caliper's size-measurements, I can tell you that it is a yankee Watervliet Arsenal bullet for .44 Colt Revolvers. The impact with the ground bent its pointed nose down to a rounded shape, shortening it by about .08-inch.
To see an unfired one, go to bullet #10-A in the updated "Handbook Of Civil War Bullets & Cartridges" by James E. Thomas and Dean S. Thomas.