I put a Leupold 1.5-5X on my .458 for the same reasons outlined above by Xusa. I intend to use it at 1.5X whenever hunting DG. I mount my scopes with the lowest mounts possible, and they are naturally aligned when I put my cheek on the stock. This scope has relatively long eye relief and I am not afraid of getting bashed with it.

Like Xusa, I am a competitive shooter. The reason for the scope is not more accuracy (I once shot a 0.5MOA group in front of witnesses with iron sights) but the ability to get on the target faster, and also to detect more precisely where to aim.

I also find conventional "open" sights far worse than peep sights. They are much harder to get on target and tend to shoot high or low when lighting conditions change. Peep sights will also do this, but not as much.

Debates about doubles vs. bolt rifles almost never mention the superior--and faster--sighting equipment available for bolt rifles, and which is difficult to mount on most doubles.