I have a CZ Duo .25 that might make for a decent pocket BUG. It's a 1948 model that is somewhat of a Colt clone. It's surprisingly accurate for the size, and will make holes in things. I'd say shot placement is everything with it, though. I've shot through 4 or 5 sheets of stacked...
Take some pictures of it for someone to troubleshoot; get the water out of there to prevent it saturating or creating new mold further. Don't run fans in an effort to dry it, as this will only push the moisture around to other areas in a basement. Sop up what you can, and get a dehumidifier...
I spent way too much of my childhood sitting two feet in front of the television with a bowl of over-sugared Cheerios watching the Bugs Bunny Road Runner Show for two hours straight , and not once have I ever been influenced to stand on the edge of a cliff holding an anvil waiting to drop it on...
To me, a reasonable round count is what your time, money and resources will also reasonably allow. Some folks' jobs and family responsibilities won't allow for regular range time, and some people are on a budget that limits these activities. Whenever you've got the time and finances to get to...
So, I got the opportunity to shoot my LC9s Pro today. Ran just over 200 rounds through it; some Federal aluminum-cased FMJs, some brass-cased FMJ, and some Speer Dot Gold hollow-points. It ate all of it just fine, and had no malfunctions, FTFs, FTEs, etc. It's a 7+1, so about a third of my day...