I followed the advice of the earlier post and cleaned the pistol really reallly well. Although the gun was very clean and lubed before shooting it, the 400 rounds must have accumulated enough trash to cause the malfunction. I agree that I should run my semi autos a bit greasier! I will start that habit with this cleaning. After the cleaning.....I was able to put 150 rounds through my little Sig flawlessly. She is back in action
I thought it might be time for a trip to the factory for her after this ordeal....she has some miles on her! Take care.
Jason