I wonder if they would work in any kind of trainer rifle?A buddy of mine has some Russian steel cased 22. I don't know what brand it is. It won't eject from any gun he has (several) and he has to practically drive it out of the cylinder of a Ruger single action. I won't put it in my guns.
He also has some other Russian steel cased 22 that has a real light bullet and no powder, it has a healthy priming compound. They will penetrate one side of an empty 33 gallon Rubbermaid trash can, but not exit the back side. They won't eject either lol.