I haven't, and I'm honestly surprised, particularly by my winter predator rifles. They ride on my back on a snowmachine and they've been literally packed with snow and ice before. My main winter gun has a Jewel in it, but I've also run the stock Tikka's and Rem 700 triggers. I'm religious about running Brake-Kleen into them all, as well as my bolts and spring assembly and then a light coating of Eezox. Not exactly sure what's in that stuff, but it really does seem to work and keep ice, snow, dirt, whatever from causing mechanical problems and it's a super corrosion inhibitor.