Kestrel Ballistics Support Page

What should I enter for Rifle Twist for my gun profile?

We changed the way that the rifle twist is entered with firmware 1.20 and higher. If you have an 11 inch rifle twist, please enter this as 1:11.00 in. This is read as a 1 rotation in every 11 inches of barrel travel. Previously this was just entered as 11.00 in. If instead you have a 9 inch twist, it would be entered as 1:9.00 in.