Sight in your rifle scope at almost any distance. This is a simplified “close enough” process that will work for 95% of shooters until there is time to read the foundational book on long range shooting. See app instructions below.
Launch App by clicking below:
Rifle Scope Sight In App Instructions:
Most precision rifle shooters prefer to have their scopes “sighted in” for 100 yards (100 yard zero). Hunters frequently like a 200 yard zero.
To sight your scope in, decide at what distance you want the bullet to impact exactly where the scope crosshairs are pointed. Sighting in at 100 yards requires the least math, but if you are sighting in today at a target that is 25 yards away – this app will be very helpful!
You should always start at 25 yards when a scope has just been mounted. OK, so now your target is up and you are ready to fire 3 shots aiming at the 25 yard bullseye. If you are planning on a 100 yard zero, you will expect the 25 yard group to be about 1.5 to 2 inches low. If you are sighting in for a 200 yard zero, at 25 yards the group should form at about the bullseye.
Now that you have fired 3 shots, open up the above app.
Is your scope MOA or MIL? (Full article explaining MOA and MIL HERE)
Because you are starting at 25 yards, Step 2 should be set at 25 yards to begin. Enter the prompted data in Step 3 and 4 and then hit the “Calculate My Adjustments” button.

This app is designed to help you step by step. If you have questions, please reach out to me so that I can better answer your questions and update the app to be more clear for other users as well. :-)
Happy shooting!
Enjoy our other free shooting apps and shooting calculators! More Apps
Learn all about long range and extreme long range shooting from our free online articles HERE.

