When Reid confronts Stone in his office, Stone is only halfway done his drink when Reid storms out. In the next shot, as Stone is alone and contemplating their conversation, he idly tips the glass from side to side in his hand (nothing spills as it is now empty.)
When Jackson is preparing to go to Duggan's, he opens his pistol chamber to check his ammunition. All of the rounds have firing pin indentations, indicating they have already been fired.