I'll have to give the sheet idea a try, that's a great idea. Thanks Mickey. I did back the chrono up to 20ft and it seemed to help. I also have a 4x6" piece of pyrex I put in front of the screen to guard against errant wads. I managed to crack it once with a 10 bore wad and also put a dent in the back end of the chrono with one that just cleared my makeshift shield! The lubed felt wads I'm using weigh about 80gns before firing so I'm sure that's enough to send a chronograph to its eternal reward in a glorious fashion.

Bob