It has been estimated that more whitetail deer have been killed in the US with a 30-30 than any other caliber over time. That many kills can't be wrong. I have a Marlin and use a Williams rear peep sight with a slightly higher front blade, best drive and brush gun setup I have ever used. I found that with the rear mounted peep that the increased sight radius allowed me to shoot more effectively with open sights. I can hit a coffee can at 100 yards over and over.