Found today in Amelia co va. Diameter (best I can measure) is .577-.58, length at longest point is .67”. Wt is 242 grains. I don’t see riflings, but it has been involved in an altercation in its life, either from firing, farm equipment, or a bored soldier. Thoughts? Haven’t had time to look at my books, but based on condition, not sure if they’d help.