Sighting in a relfex sight on shotgun?

[CanadianBaconPancakes]

I imagine the only was to do with is with slugs?

 

[st1264]

You'll need the precision with slugs to sight it in. I used a 12G bore sighter I got on Amazon to get me on paper and a couple slugs with adjustments, then I was done.

If there's another way, I don't know.

 

[Butcherbill]

How far out did you start o get on paper? I'm about to sight in a red dot on my 12g for slugs, was thinking of starting at 20-25yrd to get on the mark and then fine tune out at 50-60yrds.