I appreciate you including what looks like a Williams Type One bullet in the photo for size scale, but it doesn't actually help enough. Because you did not tell us the ball's size, all I can tell you is that it is a woodenfuzed shell, made anytime from the Colonial era through the end of the civil war. It seems to have unusually thin shellwall thickness, which indicates it is from sometime before the civil war. Round grenades tend to have thin walls, so this might be one, but I've got to have accurate diameter measurement to narrow down the possibilities for this ball. There were several sizes of round grenades from the 1800s and earlier, ranging from 2.5-inches to as large as 3.58-inches in diameter.