Home Forums Hunting & Shooting Hunting Optics Does the nitrogen really leak out of scopes in about a year?

I've seen you "misunderstand" such things before.
OK, he said he never said 140 degree water for 5 mins. Must have picked that idea up from somebody else.
The bottom line is that this is a very practical test that the owner of a new scope should perform before mounting the scope.
The other point(s) made here also tend to confirm the idea that using filler gases that have larger molecules may well be a good idea. E