First off let me apologize for all the confusion that I caused with my novice description of single action and double action live and learn. The Webley did indeed fire correctly in double action. The cylinder was fully rotated and locked in place and the firing pin struck the primer dead center. Single action was another story. As shown in the photo of the hammer, the sear had been filed on by non other then Bubba himself. I ordered a replacement hammer from our good friends at Numrich for the princely sum of $35 plus shipping. It did not come with the firing pin so I removed it from the original and installed in on the replacement ( I also swapped the hammer catch as it was affecting double action by not allowing the hammer to completely reset ). This Webley Mk IV is now functioning flawlessly in both SA and DA. Thank you all for your input and gentle guidance.