Setting the sight to the center of the grouping is called zeroing. If you want to be accurate, it's the only way to do it. Get a friend who hunts to help you with this if you need to. There are four types of sights I'll be covering. Telescopic , often called scopes, Open S ights , Reflective , red dot type, and Laser Sights .
Telescopic sights are best at long ranges in bright light.
Open sights are good at medium ranges in all light levels. Well, except night. Reflective sights are good from medium to short ranges and are useful in any light condition. Laser sights are useful only at short ranges and in low light levels. The Telescopic Sight.