I’ve had reasonably good success with my 1874 Sharps in 45-70. I can consistently keep 5 shots in a 7” circle at 300 yards and ring the occasional white 14” gong at 600 using a globe front sight. I don’t have a problem centering the globe ring around the white 14” gong but I have a problem using the globe at 600 on a black 17” target. All I see is a fuzzed gray blob, nothing distinct to use for “precision” shooting. Don’t know what to do. I could shoot a white circle but I want a standard target to shoot at. Next time I’m going to replace the globe with a crosshair, post or some other insert. What do others do? Can you see the bull through a globe that far?