Sounds as if you already have what you wanted, a definite record of this soldier's death in battle. The three rolls are those made from the time of enlistment until his death. I'm going to be surprised if anything else is available.

There are records for the regiment and its brigade which will explain what happened on the battlefield and where. There are also good maps of Shiloh showing the location of all regimental/brigade markers. That makes it possible to trace the path of each unit on the battlefield.