(50) 72 caliber 835-grain pellets. Unlike most of the ammo I have seen and tried so far, these are not from an existing 12ga mold or a tired old 100+-year-old 72cal musket mold. These are new custom molds that are meant to have a 1-to-1 fit with the AEA 72. We did this by removing the barrel, plugging it, pouring melted lead into the barrel, and creating a form. We used these measurements to order custom molds in a size that never existed before. Even new molds can have tolerances that can be too great for the ammo we want to produce; so, we also had custom sizing tools made (See last three pics). Then when we are done, we hand press the bullets through the barrel to make sure we have perfect contact with the lands and grooves of the rifling (See the last pic). Then the fun begins with lots of test firing of the product. This is the process we go through with all the ammo we make.