My 25-5 shot ~6" high with a 255 gr bullet @ ~800 fps. Looking closely, it appeared to me Smith used the same one piece barrel and sight that they used for the Model 29, just a different bore. Registered for the 29, shooting a lighter bullet much faster than Colt 45, it would leave the 25 shooting high. It was too high even for 6 o'clock hold on a 25 yd target.
I had to mill off the front sight blade and install a .043" taller one to hit point of aim and leave some room for both up and down elevation adjustment at the rear sight.