How to Sight In a Red Dot
Woody's answers are based on published federal and state law. Not legal advice. Consult a licensed attorney for your specific situation.
Mount your red dot securely, start at close range with a stable shooting position, fire a group, then adjust windage and elevation knobs to move the dot onto your point of impact.
How This Affects Your Sight Picture
A properly zeroed red dot gives you the speed advantage of both-eyes-open shooting with the precision of aimed fire. Getting your zero right from the start saves ammunition and range time while ensuring your optic performs when it matters. Most shooters can achieve a solid zero in 10-20 rounds with the right approach.
The Detail
Start by mounting your red dot with quality rings or a direct mount, ensuring everything is torqued to spec and rock solid. Check that your optic sits at a comfortable height where you get a natural sight picture without straining your neck or changing your shooting stance. The dot should appear crisp and centered in the window when you bring the rifle up naturally.
Begin your zero process at 25 yards from a stable shooting position, preferably from a bench with sandbags or a bipod. Fire a careful three-shot group aiming at the same point on your target, focusing on consistent trigger control and follow-through. Don't chase individual shots, let the group tell the story. Most red dots have 1/2 MOA or 1 MOA click adjustments, meaning each click moves your point of impact roughly half an inch or one inch respectively at 100 yards.
After firing your initial group, measure the distance between your point of aim and the center of your group. Use the adjustment turrets to move the reticle toward your point of impact. If your group is low and right of where you aimed, you need to adjust the elevation up and windage left. Remember the common phrase "follow your misses" meaning adjust the reticle in the direction you want your next shots to go.
Once you achieve a decent zero at 25 yards, move back to your intended zero distance, typically 50 or 100 yards depending on your rifle and intended use. Fine-tune your adjustments with additional three-shot groups, making small corrections until your point of aim matches your point of impact. Some shooters prefer a 50-yard zero for general use while others choose 100 yards for longer range precision.
Build Impact
Your choice of red dot height and mounting system directly impacts how quickly you can acquire a sight picture and whether you can co-witness with backup iron sights. A good zero process validates that your entire optical system is working together properly, from mount integrity to reticle tracking.