Yep.
During elk hunts, in particular, I often find myself battling rain, snow, or soggy trees (which, of course, pour down upon you as soon as you get close, even if it's a nice day).
One of my brothers runs a Remington Sportsman 78 (blued) and I run a Ruger 77 Mk II (stainless) as our "old-reliable" / "last-ditch" / "if-all-else-fails" option. Those two rifles are absolutely terrible for sticky/gooey/sluggish bolts when they get wet.
No matter what lubricant we use**, as soon as water gets into the action, it's like someone dumped a bucket of tar into the thing. We've never had it cause a big enough problem with a striker to worry us, but I once watched my brother take almost 20 seconds to open the bolt on that Rem 78 ... because that's as fast as it would move with the oil/water emulsion and the cold temperatures.
So, most of us now run as "dry" as possible if we know water is in the future. Then, at the end of the day, we do a basic field strip and wipe down with Rem-Oil wipes for the night (just to wipe it back off the bolt in the morning).
And we simply accept the fact that once the hunt begins, the rifles may have to live 'wet' until we have a chance to fully strip and clean them. If it is something we truly love, don't want sitting in moisture, and find ourselves carrying while caught in rain or 'tree melt' on what should have been a nice day, then we may break out the tool box and detail strip the firearm for a dry-and-lube session.
But the average hunting rifle ... that's their job. Moisture will happen. And, outside of extreme circumstances, we take care of it after the season.
**This year, I'm trying Slip2000 lubricants. I ran them last year, as well, but it wasn't much of a test. I didn't get wet or have to deal with snow during any of the 4 seasons I hunted. Crazy year.