Thank you for the reply. Good idea about protecting the chrony. Never thought of that. How far did you set the chrony from the muzzle of the gun. Usually i set it at about 12 feet for my centerfires.
You do not need to change the distance, but beware the sabots. I simple duct tape a piece of plywood across the screen, and remove it to take the readings (cheap but effective). Also, you can break your sensors if you use the skyscreens. I either don't use them, or put uncooked spaghetti in the holes as guides. If you put a sabot into the metal supports for the skyscreens you can destroy the sensor.