I think I posted in the wrong area earlier so here it is again. I found a lead mini ball across the street from a fort being restored in Naco Arizona. It's right on the Border and after reading about the town, there is some history there. Pancho Villa took over Naco Sonora in which is across from Naco Arizona during a 2 month long siege every home on the US side in Naco (not many homes as this has always been a small place) had several holes in them. Also, the Fort there which was occupied by the Buffalo Soldiers back in the late 1800's and early 1900's and is where it was found it. Well across the street. The thing I wonder is that they had cartridge's by then. The thing is that this bullet probably came from the Mexican side and was there a chance they were still using mini balls?