I don't really trust the gun. When my thermoprobe was reading 290 my gun was showing 350 and the ink was not cured. I think the gun can be used as a baseline tool once you get everything set with the atkins probe but I still wouldn't trust it completely. I know what you're thinking though, you've relied on a tool that never has let you down, you've probably never undercured a shirt but I really trust the donut probe over the gun.