Ok I got it. I had a round that didnt get powder, so when the primer went off the bullet moved forward just enough to keep the cylinder from rotating. A dowl rod and some light hammer tapping pushed the bullet back down and I was able to free it up.
I was worried there for a moment, I just bought this SP101 used and thought I had some serious problems. So for now the dowl and hammer stay in my range bag and obviously only factory loads when carrying.
Nov 2, 2011 sent form 4, SS Sparrow. Arrived May 29, 2012.
Jan 30, 2012 sent form 1 for SBR. Arrived July 12, 2012
Jan 22, 2013 Sent form 4, 762-SDN-6. Arrived Sept 13, 2013