I purchased a stainless Ruger Mark II .338 new in 2006. It took about 3 years to fog the first scope (a nikon Buckmaster). Since this time I have fogged a scope almost every year including 4 leopold vxII's. I have talked to multiple people who know a lot about guns and most people will say it must be the scopes being faulty. Other thoughts have been that I am mounting the scopes incorrectly and crushing the tubes although everyone has said they look ok when they look at the failed scopes. This year I bought new scope rings and payed a professional to mount it for me. After 2 deer hunts and a goat hunt my leopold (with leopold scope rings) failed on a caribou hunt. I live in Southeast AK so of course it rains a lot and hunt I lot but something is not right. Anyone have any thoughts? Thanks.