From one of his spaghetti westerns. Clint is taking a bubble bath, and somebody thinks that would be a good time to ambush him. He’s wrong, because Clint has his gun in the bath with him, and blows him away. In the movie, was he expecting trouble, or would he always take his guns into the bath with him? Seems fantastical that somebody would do that, mainly because it wouldn’t do your guns any good.
Sounds like “High Plains Drifter”. He actually was ambushed while getting a shave and had his guns under the towel. He was later ambushed by the angry woman while in the tub, but didn’t have his gun in the water. But, yeah. He was expecting trouble in the barber shop, so had his guns handy.
Don’t think I know the movie you are talking about. It would seem that guns in the water might be problematic.
The bubble bath scene I know from an Eastwood movie is with Tuco in The Good, the Bad and the Ugly
The Good, the Bad and the Ugly (10/12) Movie CLIP - When You Have to Shoot, Shoot (1966) HD
Metal cartridge cases are waterproof for at least a short time. As long as the barrel isn’t full of water, there shouldn’t be a problem. Though if the gun is submerged, the water might slow the hammer enough to prevent a solid strike on the primer.
Modern guns being fired under water.
You might be thinking about Tuco played by Eli Wallach in the movie, The Good The Bad and The Ugly. Tuco is in a very bubble filled bathtub when a one armed guy shows up to kill him. Tuco has a pistol which he was holding out of view inside the bubbles but not under the water.
Shoulda posted quicker I guess
Ida swure it was Clint. I can even see his stupid little cigar in my mind’s eye 
Must not have been enough bubbles.
It doesn’t have to make sense, it’s just a movie. You can’t second guess everything that happens in a film. I write screenplays, and there is often something in a scene that would never happen in real life. As long as it advances the plot, it’s all good.
Now there’s a thread ender for you 
If you’re going to post, POST! Don’t monologue.
“When you hafta shoot, shoot. Don’t talk.” after he blows that guy away. Then he wipes the bubbles off the gun in a very, uh, manly and insulting way (to the guy he killed).
My favorite movie with Eli Wallach is The Good, the Bad, and the Ugly. My wife’s is The Holiday (I also like it). A lot of room between those two.
Not sure I can comment on what the bubble bath would do to a gun back then…
Maybe the gun was brand new and he was doing a relic, which only makes sense if you’re a guitarist, and even then it doesn’t make any sense 
It’s a common thing in westerns. I’m sure Wayne did it a few times.
It amazes me the stuff westerns tell unsuspecting viewers what will happen with shooting guns, in many scenarios.
They’re mostly unbelievable.
Never saw, nor wish to see, John Wayne in a bubble bath.
No bathtub scenes, but John Wayne did shoot a baddie through a shower door in Big Jake
Big Jake? I heard he was dead!
Not hardly
The woman who shoots at Eastwood in the tub is Marianna Hill, who played Dr. Helen Noel in the Star Trek (TOS) episode, “Dagger of the Mind.”