I hunt in upstate NY it's almost always raining or snowing, I leave my shot in for a week at a time. The best thing to do is make sure it is dry where you store the gun. You can push the shot out the breech, but remember that your action is going to get dirty when you do this, and will need to be cleaned. Yes you can reuse the sabot as long as it is not damaged I've even used sabots that have been fired.