I've been playing with different bullets lately and testing for accuracy.
I normally shoot USPSA and ICORE with my revolver with standard iron sights but for testing I first put a red dot on my Model 627 S&W and then mounted a Leupold 2x LEE pistol scope.
I'm getting better results with the scope, although the red dot is pretty good. The dot just covers the x ring of my sight in target at 25 yards. I think I hold the scope more still since my groups are about 1/2 to 1/4 in better on the average.
Since these old eyes aren't near what they used to be, iron sighted tests open up about another 1/2 to 3/4 inch over the red dot sighted groups.
Once I have my testing done I'll put my iron sights back on for competition.
What do you like to do and why?