I had the same problem as Single Six with putting only the front sight on the target. Shots went off center, high, left, right, etc.
The only way I've been able to "engage" the bullseye for what might be called "point shooting", is to bring the gun (snub revolver for me) to eye level. Then both sights are in view without having to really "aim" with the sights aligned together.
Believe Cooper taught this. Check this old thread....
Anyway, my opinion.