I tend to disagree that the bullet will rise past 25 yds. When I sight in my pistol I make sure the height of my muzzle on the bench is the same height of the X on the BC27 target at 25 yds. Basically it is flat or shall we call it 0 MOA. When I shoot PPC at distances of 10, 15, 25 and 50 yds I aim below the letter X at 10 yds as you mentioned to compensate for the height of the front sight and at 50 yds I aim at the chest below the shoulder. Most of my competitors have established the same method in relation to the bullet drop or what is known as the rainbow effect. Its the same effect for rifles. As a retired engineer, I’ve seen my share of surveying results and datas pertaining to earth curvature, ballistic researches on rifling twist, projectile ogive profiles, etc. But one basic rule I find most important, the trigger pull.
in falling plates event with the diameter of 8 inches at distances of 10,15, 20 and 25 yds. my hold is basically the same all through out. As a 73 yr old and long in the tooth shooter I have resorted to arm length prescription on my right dominant eye and distance on my left eye when I shoot iron sights. Obviously the right to see my front sight and the left for the target. For IPSC I use my progressive lens. I developed my two eyes open shooting style when I was 27 and when I shoot at farther distances I squint to narrow my iris the same way camera lenses do at f32.
i gave up bullseye shooting a long time ago when I caught myself dozing off at times.