My SOP: If no visible target/threat exists, you decock or put your safety on; take your finger out of the trigger guard and pull into a retention position. If you're trying to use your firearm in as safe as possible manner I would think that you would avail yourself of all of the safety features of your preferred action type and just because you may have had to engage a threat with gunfire doesn't mean that there isn't a hands on threat waiting in the next doorway.