The Javelin missile uses a directed charge warhead; directed charge warheads do not produce entry holes the size of the hole in the wall.
The Javelin missile does not 'recoil like Hell' as Captain McCormick says; it is designed to have manageable recoil.
The Javelin missile is a system wherein the launch tubes are swapped using a detachable control unit; the missile isn't loaded from the back of the launch tube.