strange object on a old mission site,

[le fouilleux]

need help about this strange like bullet,the shell are made of brass and it contain lead inside

 

[TheCannonballGuy]

It is a copper-jacketed .45-caliber bullet, most likely for a Colt .45 Automatic pistol, although other types of firearms can use it. It dates anywhere from the very-early 20th-century to today.

 

[kyriverpirate]

I agree look like 45 acp