Welcome to the pistol forum....

I use my old Original 6 with iron sights at 10m and as long as you have got your zero sorted
at 10m when sighting in you concentrate on the foresight the target is out of focus as is rear sight..

But I understand what you mean being an oldie myself,I have found the fibre optic sights on my HW 40
very useful but never actually changed any iron for fibre optic on any gun....

Best of luck with your quest....