Are you still thinking? (Probably not, huh, but somebody else might like to know.)
The, 'Big Dot' sight is strictly a close range sight. Used inside 10 - 12 yards it'll help you to pick up the target quickly; but, you're still going to have trouble placing your shots with precision. IMO, Trijicon, AmeriGlo, or even Tru-Glo, 'TFO' sights are better ways to go