Backstory: I hated the red insert front sight that came on the gun and wanted a 3-dot style front sight that I'm most used to. So, I went and bought the MeproLight ML-22771 and had it professionally installed on my revolver.

I took it shooting and noticed that my groups at 10yds were nice and tight but consistently 4" high with the rear sight blade bottomed out.

Side Info: 4" barrelled 586-8

Question: Is the ML-22771 the correct sight set for my revolver or should I have gotten the ML-22770?