I used to reload my 44 mag. It was a Ruger Super Blackhawk 7.5 inch barrel I think, I don't remember, and I had a Model 29 6 inch.
When the cases would get worn out I used to drill out the flash holes in the primer pocket to about double the size they were and seat a primer into the case. Then I would heat the other end of the case with a lighter for a few moments and them push the case into a rectangle of gulf wax. Viola! Wax bullets! You could rip open an empty beer can from across the room! The reason you drill out the primer flash hole is because if you don't the primer will back out of the pocket when fired and lock the cylinder down. Not forever but it makes it hard to get the empties out.
That's pretty cool, I'll have to try that.
I have a box of .38 Special plastic bullets that only take primers. They can go clean through both sides of a cardboard box when I shoot them out of a 2" barreled Colt Cobra.
I have those too, try the wax loads though, cheaper, so easy. But like Mike says drill the flash hole out. Much cowboy ballon shoots etc are wax loads