All credit goes to CC member Rick Foster (DragoonRick). I took his idea and research and made my own version of a DIY percussion cap maker.
I made mine from brass in the same manner as Rick but adapted it to a reloading press hoping to produce caps with more speed and less effort. I think I had a small degree of success.
It's all pretty much explained by the pictures and captions.
I made two sizes of star mandrills, one for 1/2 inch disk and one for 7/16 disk and a punch that mounts in a spare crimping die I removed the crimper from. The punch is mounted to the press with a Lock-n-Load adapter.
I cut off a 45-70 case and soldered the bottom to the star mandrills so it fits in a #8 shell holder.
Punch out disks from aluminum cans or I prefer the new style aluminum beer bottles, they are made from heavier aluminum. I annealed the aluminum before punching out the disks. It is necessary to anneal whatever aluminum stock you use.
Set a disk in place..
Pull the press handle. The cap drops out the depriming hole in the press ram.
I made two sizes when I discovered that the bigger 1/2 inch disk made the cap skirt too long to fit on some nipples on smaller guns like the .36 cal Pocket revolvers.
I tested both sizes and had moderate success, 60% with 2 German made roll caps in each cup. Then tried 3 caps in each one with no improvement. I'm going to order some of the "Prime-All" compound from 22 ReLoader and see how that works. I'm not willing to crush match heads and glue stuff in place just to make a few caps.
All in All I'm not sure this DIY cap making is worth it. I'm embarrassed that I spent the amount of time and effort I have spent on this. I will never ever make a cap as long as I can buy them. It's too tedious and boring for me so I am now more willing to pay higher prices for the caps I need.
I can now rest assured that I can make my own caps if needed but I'm praying that it never comes to that. Tomorrow I'll be ordering some RWS caps. Powder Valley still has some in stock.