Why would you melt down historical artifacts?
Just kidding. Those are cool to have, especially since it sounds like you found them yourself.
I used to work with a guy who’s brother was a forensic historian at one of the battlefields. He told me one day, a family came in and mentioned that their great great grandfather fought in the battle. He asked which side, they told him, he asked if they knew his rank. He was a Sergeant Major. He then said, well, there were only three Sergeant Majors who fought in the battle that day. Each carried their own sidearms. Two were one caliber, the third was a different caliber. He then went into a cabinet and removed a box holding a single spent bullet. He said that he dug this out of a tree and since it was a specific caliber, there’s a huge chance your great great grandfather fired this bullet.
History is awesome.