There are a few things to entertain here before getting closer to the answer. I have questions:

Did you clean the revolver before shooting it?

Was the cylinder free from excess oil and just clean shiny metal before firing?

Did the extractor function properly before firing?

Can you post some pictures?

This is just the tip of the iceberg. I have shot a 317 and it was a pleasure. I suspect you may be contending with something other then a manufacturing defect, but I may be wrong.