A primer on properly setting up Chairgun

Thank you amjadck.

No, because Chairgun uses the original zero as a basis on which the number of clicks is determined for hold-over and hold-under using its physics-based algorithms. Once you enter a different distance value on the “scope height” box, however, the click values will change because Chairgun will then use that new distance as the new basis.

It doesn’t matter if the scope rail has a 20 MOA rail or if adjustable mounts are used (which let the scope point downwards or upwards). Chairgun goes with the scope’s line-of-sight to the muzzle as the measurement for scope height. That is why I stated in the article that if the zero distance is changed, the scope height must be re-measured using the method from the link provided in the article (as it has been explained and proven on the last two pages). The method I use to measure scope height is the most precise and can provide the true height even from MOA rails.

You’re welcome Cricket. I enjoyed doing the fieldwork and typing out the information. Keep in mind that although scope height and pellet BC are critical parameters, all the other ones (environment altitude, temperature and humidity; click size, a fine-tuned mildot spacing, and velocity) are also important to input into Chairgun if you’re after a high level of precise ballistic information.

On the contrary, if you’re shooting out in deep space near a black hole you’re $#!+ out of luck and on your own as the laws of physics are thrown out the window there! :winkn: Sorry, that’s the astronomy fan in me speaking. :biggrinn:

Also, what’s not in the article is the need to input the correct environment elevation, temperature, humidity, and air pressure values into Chairgun to increase ballistic precision. I use the Yahoo Weather app to give me the temperature, humidity, and air pressure information.