Have an Aimpoint 9000SC on a Ruger #1 450-400, Aimpiont Micro H-1 on a S&W 41 ( both tube style red dots ). J. Point Reflex on a S&W 629. Really like the Aimpoints, never lose the dots ,eye relief not an issue. I do sometimes lose the dot on the J. Point. My biggest problem with the dot sights has been getting use to that" little red speck" dancing all around the target.Have had to really concentrate to not start snatching at the trigger. For a double I would lean towards the Aimpoint Micro H-1.