This topic comes up from time to time, so I'm sure you could do a search and find lots of info / opinions.
Personally, I've got more than a few C & B revolvers and have left several loaded for quite a long while. I no longer seal with grease, preferring felt wads instead, so leak out isn't a problem.
The only negative experience I've had was with one of those little Remington .31 pocket revolvers. All 5 went off, but it seemed to lack its normal level of power.
My Colt, Remington, and Starr revolvers have never given me a problem nor failed to go off, even after months of being loaded.
That's been my experience, anyway.