I have been using the plastic ones. with primers alone, they are a joke. They hold about 10 grains of FFFG, and give a small under-boom and some white smoke. Once they are fired, a small piece of masking tape over the hole in the nose will keep the powder in better than crumble foam, which takes up room. I drilled some out on a drill pressand made them hold about 20 grains, and that was better. They split, though, about 30% of the time.
I am going to try the Ten-x blanks, and see if there is a way to reload them. Maybe cut off a little of the crimp and use crumble foam.
Anyone have a few empty ten-X blanks I can play with?