I don't know what they are called. A guy at Friendship was selling them on
the pistol line a couple years ago for a dollar for 25 I think. I picked up about
a hunderd. Here you can see them better on this stand I made. They will
hold about 30 grs Goex FFF Black Powder. I pre-charge them and use them
in the timed fire matches. Thats 5 shots in 5 min.