I grab a brass ingot from the sack and I grab the metal container where I put the leftover metal from the removal process. After all, grabbing a little bit of brass from the 1 kg of ingots will remove a lot of those metals that I should assemble as something different.
I open my status window first and move to [Material Manipulator I] to open the 5.56x45 NATO blueprint. I open the blueprint and select the brass casing first. I fiddle with it first, to make sure that the little small measurements are correct in the blueprint.
Remember, the blueprint is in the form of a mesh grid forming a 5.56 casing. I make sure every single adjustment is correct, and eventually, I am braving myself to create the first bullet. Since this is precision machining, it's better to shred the material first before actually crafting it. I hold the brass ingot and shred it into small tiny balls in the metal container.