RE: H&R shotguns?
I have a Bushnell multi-reticle red/green dot on my slug gun and Bushnell holosights on my son's slug gun and my Benelli Nova slug barrel. Here in Iowa, there is rarely a shot over about 80 yds, so I find them great for quick acquisition, both eyes open shooting. Yet they are still effective at 100+ yds. With the rifled barrels and sabot slugs, where the dot is, so goes the slug.