This is one for the 3D print geniuses out there. I’ve found when I load 45 Colt with black powder, I prefer using a Lee Lee Loader. I set all cases in a loading block and using the belling tool and non-rebounding hammer, I can bell 50 cases in less than a minute. Afterwards, I prime with a priming tool. If at that point there was a 3 D designed loading block just over rim size, loading becomes fast. At the bottom of the loading block, a center hole, bigger than primer diameter would be “cut” like the Lee Decapping Chamber tool. Now, moving a dipper down the line, cases are filled. This next step is where the 3 D tool would come into play. Bullets could then be seated with the Lee tool, going down the row of cases in the improved loading block, and then crimped in the same manner, all without removing each case from the block to do the two operations of seating and crimping. Of course, it would work for any caliber loadable with a Lee Loader and I suspect even faster than using a press