If they're not firing, then they aren't head spacing on the the chamber mouth. I'm guessing that you are crimping so hard that the case edge is slipping past the case mouth.
But, usually the case is held by the extractor sufficiently for the firing pin to ignite the primer, so now I'm wondering if your problem Description is faulty.
Probably what you really mean is that your reloads don't chamber, so the slide doesn't close enough to depress the disconnector - so you don't get a "click".
Since you shoot revolver, it is possible you are trying to use a revolver cast bullet in your auto.
I think you need to provide a bit more info.....
