I’m with Nate. There might be dies available for reloading rinmfire, but I’ve never heard of it. Proper reloading procedures are perfectly safe, but in the case of rimfire you are, in effect, dealing with a primed case while unloading it. Rounds are designed to be unloade by firing.

Unless there is a process I’m not familiar with, which is very possible, I think the rimfire is best left alone.