I have an older M66 12" 357 Silhouette. Problem is with a target load .357 (148 HBWC and 3.1g Bullseye) , with the rear sight as low as it will go. Gun shoots about 2" high. I need to find a different (taller) front sight blade. If I go heavier bullet it's even higher. Taurus was no help. Anybody mess with one of these? I need a taller blade and wonder what if any would fit. It is a pined partridge blade. Just eyeballing some smiths like 686 they look like the blade might fit, but if you have tried it, please help me out.