Hi, was at our shore house in Belmar, NJ yesterday for Mother's Day and searched the beach for a little while since there finally letting people on it again. Found something besides change for once, looks like maybe a musket ball? It's 8.8mm and 4grams.
Thanks guys. Yeah wasn't sure what it would be considered, found this link that said, "Gunshot is defined as those pieces of shot ranging between 3-7mm in diameter, while musket balls are 8mm and up." So I went with Musket ball
Way too small to be a musketball, most likely a 36 caliber. Could be rifle or pistol, no way to tell which but rifles were much more common than pistols in early america.