I do not think that for common hunting purposes it matters. Possibly in very heavy rain it could. But, in rain that heavy, you can't see far enough for it to matter anyway. I've shot deer in both snow and rain. OUt to 150 yards. Never had any issue. You could hit the range and see what kind of results you get maybe.
In my opinion, for common hunting purposes at common ranges, it doesn't matter too much. Ridge Runner and some of these other LR guys may have better input for the longer shots.
-Jake