My shotgun was sawed off at 20 inches, so has no choke, and is called an Open Bore or Cylinder Bore.

I had to do a little trial and error to set this one up.

First, I opened up a couple of 12 Gauge shells and poured out the #6 shot.

I then tried to fit dimes into the shell, but met with a problem.

It seemed that with the normal shot cup, the petals were just too tight of a fit for the dimes.

I tried, but couldn't get them to lay flat in the shell.

I then thought about it for a while and decided that maybe if I removed the "wings" or petals from the shot cup, the dimes might fit better.

This turned out to be a problem, as the shot cup would not come out of the crimped portion of the shell.

I finally just cut off the crimp with a razor knife and was able to remove the shot cup.

I then cut off the petals and replaced the bottom of the shot cup back into the shell to use as wadding.

The dimes then went in just fine, tight, but laying flat.

I could get 16 dimes in the shell.

I cut a small piece of thin cardboard for a top and placed a couple of drops of candle wax on the sides, just to hold it all together until I could shoot them.