Noticed this thread popped up from last fall.
UPDATE: After putting a box or two through, I noticed a lot of blow back on my face, way too much for a revolver, and I had trouble ejecting empty casings. Actually needed to tap the ejector rod on the bench to get the empties out.
I also noticed that some of the brass was splitting. Now the 327 Federal Magnum is a very high pressure load, so it didn't surprise me that the brass would fail, but not this bad. I determined that one of the six cylinder holes was giving me problems, so I indexed it and sent it back to Ruger.
I received an email update from Ruger saying they were replacing the gun, shipping a new serial number SP101 to my dealer. No questions asked.
So with the nice weather yesterday I got to shoot the new SP101 and everything worked out just fine. Nice having this piece back in the rotation.

for Ruger and their customer service.