I’ve went one round with this topic once already but I’m changing things up a little and including some sketches and ideas that have developed.  I’m hoping to inspire others to make tooling and play the game.  This may sound a little bold or arrogant but until one has shot a target such as this and measured the actual distance from center, a center mark that you placed, accuracy takes on an entirely different meaning.   
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The Bottle Cap Match game in some parts of the country is still very active and the interest I’m hearing in my locale is motivating me to do something about it.  In a haphazard condition I’ve made a slight variance to the original game but nothing I’m going to lose sleep over – the original discs sound like they were 1.65” diameter or so, mine came out to be 1.604” diameter.  I believe this variance was caused by a measurement I made on the measuring device from an original kit.  The table, or platen that the shot disc is placed on to measure the hole’s distance from center, had a diameter of 1.604”.  To get a true zero for the original setting, it made sense to make the discs this same exact size so that’s my reasoning for the disc discrepancies.  My first punch and die set I made produced a .042” thick disc, 1.604” diameter, as did my second set.  So now, the future punch and die sets aren’t going to wander from those dimensions.  The measuring devices I’m making are all getting the same size platens also.
I made the first die to fit an older Lachmiller reloading press.  This was a C-frame design that I have had kicking around my mess with no real intended purpose.  The bore on the top had a bushing in it to accept a 7/8” die body but when I removed the bushing, the opening was a 1.25”-18 thread.   I thought this would work nice as the stem on the punch then could be hefty.  It works well but probably overkill.  The next die set I made to fit a RCBS Rock chucker, with the threaded bushing removed.  That’s a 1.25”-12 thread condition – still plenty of room for the stem on a punch.  My first couple of dies were made all one piece, a slot for the card stock – cut with a slitting saw.   Not a terribly difficult operation, but definitely not as simple as the next version.  On the third punch, I decided to make a ring that was removeable, could be re-sharpened or replaced.

Greg,
That is just plain cool! Nice machining. Do the cards get printed with a bullseye? Seems like a while back someone posted the actual measuring machine.

Greg,
This thread is getting my blood stirred up to get going making these tools.  I think some around here would enjoy this.
Nice work…as usual.
Bob

we had a great time last night, even though i lost 2 whole dollars.i got a new scope mounted so i am out to win my money back. it is a great facility and very close. i see being a regular at it shooting a lot.    tony<><

here's an update, I took some more of Tony's money last night
The final score for the winning target wasn't that great, just enough.  Total for the overall on it was just barely under an inch, .996" for twelve shots...
The excuse I came up with for such a poor score was when we showed up the range was quite cool so we had the heater running and the air currents really messed with the group size.
GT

We've refined some of our processes and I've cast the "hook" in several directions playing this game.  We generally shoot at least once a week at a neighboring community's indoor range, last night was no exception.  Nine individuals showed up to share in the frustration.  Tony's first target was very good but it was all downhill after that, he didn't even come up with any new, good excuses...  
For the folks I help set a hook in at the Greeley show, here's a holder a few are making for holding the discs, saves time and tape...

Waterman,
That it is, but the following for "shootin' caps" has been fairly intense, and addicting.  I showed up one evening and thought a change might be nice, had some 50' silhouette and schuetzen targets with intention of having a different match, most were going to walk if we weren't shooting caps.   I haven't broached the subject since. 

A different shoot happens mid summer at one of the other clubs.  It follows close to your wafer shoot, it's called the candy match.  The MD glues up a pile of targets with Lifesaver candy covering the bulls.  The object is to send a 22lr slug through the hole without breaking the candy.  They shoot it at 25, 50 and 100 yds.  Scoring is substantial for centers that don't break a Lifesaver at each distance... (+25 @25, +50 @50, etc. 1 pt for keeping it in the rings, 5pts for being on center and breaking the lifesaver) Luck has a little play in this but not as much as one thinks - from some of the scores.
GT