RelicHnter, thanks for providing a base-view photo of your bullet. Unfortunately, I still can't quite be CERTAIN about the base-cavity's shape... is it a cone (like a letter v) or a bowl/dish (a very short letter U)?
If it has a cone cavity, the bullet is probably a civil war Confederate-made Minie bullet, as I guesssed in my previous post. If the cavity is a bowl/dish, the bullet is probably a postwar rifle bullet such as a .44-60 Sharps. But as I also said previously, for certainty in identifying it, we REALLY need you to measure it with a Caliper, which measures in 1/100th or 1/1,000th-inch increments.
If you are going to continue digging century-or-more-old relics, let me urge you to buy a good-quality Digital Caliper. Harbor Freight Tools sells good METAL ones for about $20. Don't buy the plastic version, it wears out and becomes inaccurate pretty quickly. A Digital Caliper measurement can be crucial fo correctly identifying bullets, coins, buttons, and buckles, among other relics when "size matters a lot."
If you don't mind, please tell us the area of Alabama you dug the lead ball and bullet at. I suspect both of them are civil war relics... and I suspect a Caliper would show the ball to measure about .645-to-.655-inch, which would make it a Colonial Era or civil war .69-caliber musketball. (That is why guessing with a ruler is too inaccurate... as BosnMate said, 5/8th-inch is .625-inch, which gives a different identification for the ball.)