Had the same problem with a 51 navy,, used a dremel to lower the ears on the hammer,,also made the rear sight picture square,,and filed the sides of the cone front sight giving me a sighr picture of a square post and square notch rear sight,,It took a bit of time of shooting and tweaking the sight to get it to shoot to point of aim,,But now it has taken the place of my S&w model 17 for my small game handgun.