Preload cylinder

If the charge holes were clean & dry when loaded you'll be fine. Make sure the mouths are sealed and if there's any chance of exposure to water or really high humidity, seal the capped nipples too.

As long as you can store the gun safely, no reason not to. But remember your plan to shoot it somewhere and think about safe transport. Plus if you live in one of the nanny states a loaded gun in a car could be an issue. If you get pulled over, refuse permission to search your car.

I often preload cylinders at home before going to the range usually only a day or so before but sometimes plans change.
The ball, if the proper size seals the chambers and the flash hole is so small I don’t see how there could be much humid air entering so I don’t cap. An uncapped cylinder on a a revolver doesn't constitute a loaded gun IMO.

There have been posts in these pages on revolvers loaded for extended periods of time and still discharging fine.

I have in the past left them loaded for over a year. Powder, ball and capped. Fired just fine.
If kept dry and out of extreme heat it should be fine after 100 years.

I know of at least one instance of a rifle musket firing after being left loaded for a hundred years.

My father in law bought it and was cleaning it up. He couldn't unscrew the breech plug, so he used penetrating oil and applied a Bernzo-matic torch. He wound up with a .58 caliber hole in his garage wall.

My new Taylor's Ace 1858 came last week and I loaded up a couple extra cylinders and brought two along that were loaded in 2018 when I still lived in Minnesota. Evey one of them fired with the same power.

Should be in the Blackpowder sub-forum.