Was cruising Gunbroker and saw an auction for these. Notice the caliber on the headstamps.
(http://pics.gunbroker.com/GB/484950000/484950421/pix811363866.jpg)
(http://pics.gunbroker.com/GB/484950000/484950421/pix492949709.jpg)
10mm/40S&W is the right size inside diameter. and if you are going to use one or the other, you gotta go 10mm.
I saw a set of these at a gun show this past fall......aside from the spent casing, they were cheap crap. The guy wanted $39.99! :o
I'm not saying these posted here are the same; but just that I saw some similar. :)
Go on youtube. Someone has a video on how to make them.
.
Now that, if they were good quality inside, id sure buy them, for a reasonable price...
This reminds me of something I saw a while back that id love to have: a hat band for a drover style hat ive got, that had .40 cases in bullet bands.... but hey, switching those out for 10mm cases? Easy! Problem was they didnt have any black or Brown leather versions, just like reds and greens, and blues! Oh well, one of these days...