Thanks for your reply.
OK>>panic over...I pulled the pin and jiggled the cylinder out.
With no cartridges, the action works fine...and YES, they are reloads, but I have put over 400 of these through and they were all reloaded by the same guy.
This is the first time this has happened.
I will look at the primers.
Just in case there is a bigger problem than this, any recommendations on someone with expertise in the SAA or SAA clones to whom I can send my baby?