No offence taken.

I have to admit I feel a little dirty every time I use it

I have used the open sights and they did shoot surprising well, BUT, it really does shoot so well with the reflex sight. I don't know if I got lucky but the reticule is very low in the window and I don't have any trouble shooting with it.

So far as regulating- The below is 4 shots at 50m, resting on a sandbag. I think this will do me.

I was firing HRBC 300gr cast bullets with 43gr of ADI 2207 (approx 1950fps).