[jonesb930]

I had all the work done at Ollies in Santa Anna, CA. They were recomended by many people including Andial. Looking at the tool marks it apears that they used a ball nosed endmill in a mill. Looking at the radius it looked to be a 1" dia. The work was not that expensive and they were doing several other things to the case at the time (boat tailing, shuffle pinned, checking bore, etc.)
They really did great work and were very easy to deal with.