I had Power Custom in MO. convert a NIB 929 over to a 9 MM/38 Super dual cylinder conversion.
He cut the front compensator mount off and re-contoured the barrel and lug, and performed a complete double action only job,
Every part in the gun was replaced with a tool steel replacement item and the cylinder stop and hand were refit using over sized parts.
After about 200 rounds of 38 Super, same problem developed as it did with my other 929 9 MM.
Firing pin bushing erosion or as I am being told, flame cutting due to the Federal primers.
It happened with 124gr. Berry HBFP, 147gr. Montana Gold FP and 135gr. Bayou using Titegroup, Power Pistol and 231.
The common items in each load were the following: Starline Brass and Federal Primers (of which I have been told by Ron Power) that he believes is the culprit. He believes that they are too soft for my application and suggested that I switch to CCI or Winchester.
I am making the switch and will be feeding him the results soon. I will post it here also.