There is one thing that can happen though,,,
Often (not always by any means) the oil will harden or congeal after long years of storage,,,
I would at least give them as thorough a cleaning as I could before I shot them,,,
Not because it would be dangerous but so they would operate efficiently.
My sister bought a S&W revolver in the 60's and kept it in it's box until a tornado took her house in 1999,,,
The revolver survived beautifully and didn't even get wet,,,
But the 40 year old oil had congealed into a thick grease.
just a suggestion,,,
Your mileage may vary.