Press Checks – Is the gun loaded? Rob says that with reliable loaded chamber indicators – who needs it? Good point. Also, moving the slide a bit and guess what, the round gets mad and decides not to go back into the barrel and the gun won’t work!
Press checks aren't a good idea during a combat scenario, but to do pre-combat. For example in the morning when you first holster the weapon, or other cases where there is no threat but you still want to check that you gun is loaded.