In all honesty, I was very surprised at how EASILY water poured into the barrel of my rifle when I did that test the other day.
It made me seriously question the wisdom of carrying empty, taped, muzzle-down, and in freezing rain conditions. To end up with a barrel FULL of water, or ice, would be a pretty easy thing to accomplish.
Now, that's a lot of variables there that all have to come together simultaneously, I get that, but... just worth mentioning. Those actually are conditions I've hunting in once or twice though I carry "hot" and untaped, so it wasn't a concern.
I never did try a water test with a round in the chamber. I suspect that DJ is right- it'll seal it "good enough" to keep the vast majority of water out.
