Well, I have the same model Pietta as you that I bought from DGW 3 years ago. I have shot it with both cap and ball and 45 LC in a Howell conversion cylinder. Both hit dead on windage wise at 25 and 50 yards from the bench and offhand.
Looking at my front sight from the shooting perceptive, my front sight appears slated to the left. That's how they regulate it from the factory. Looking at my revolver's bore as you photographed yours and if I keep staring at it... it looks like yours... well maybe.
I never did really see anything off with mine, until I saw your picture. My Pietta shoots great and its a keeper. Try yours at different distances.
Looking at my front sight from the shooting perceptive, my front sight appears slated to the left. That's how they regulate it from the factory. Looking at my revolver's bore as you photographed yours and if I keep staring at it... it looks like yours... well maybe.
I never did really see anything off with mine, until I saw your picture. My Pietta shoots great and its a keeper. Try yours at different distances.