I like to use the Colibri to sight in new scopes or sights, without having to wait for range day. Being single, shooting indoors ain't a problem.
A cardboard box filled tightly with old rags works well for the regular Colibri, and my "range" (from living room, over the easy chair, into the bedroom - nothing but paper!

) is about 25 feet.
It's enough to get a ball-park adjustment, then tweak the elevation when I get to the range.
With our local range closed these last two months for renovation, it's been the only shooting I can get in, too. Neighbors are too close for yard shooting.
