Load a full magazine into the gun with an empty chamber. Point at the target, pull the trigger, feel the “click”. With the heel of your palm hit the bottom of your magazine (with some fervor; this is the “tap”). Then twist your gun 90-degrees to the right (so the ejection port is down) and. . . Rack the gun by pulling the slide straight back and letting go; do not ride the slide forward, let it slam (this the “flip” and “rack” part of the drill). This will drop a possibly dud round out of the chamber and load a new round into the chamber.
Pull back the slide to expose an empty chamber, lock empty brass so it is sticking out of the chamber. Load a full magazine into the gun. Point at the target, pull the trigger, take note that there is no “click”. Visually see the brass sticking out of the chamber. With the heel of your palm hit the bottom of your magazine (with some fervor — this is the “tap”). Then twist your gun 90-degrees to the right (so the ejection port is down) and. . . Rack the gun by pulling the slide straight back and letting go; do not ride the slide forward, let it slam (this is the “flip” and “rack” part of the drill). This will drop the brass out of the chamber and load a new round into the chamber.
Grab the slide and Lock it back (optional) Press the magazine release and (while your magazine may fall out on its own normally, a type-3 will prevent it from doing so now) strip the magazine from the gun. You have an option here. Either you drop the magazine, or practice retention where you hold onto the magazine to continue to use it. Grab the slide again and rack it hard three times. Reach for a fresh magazine (or use the one in retention), put it in the gun (same as the tactical reload) #*Rack the slide one more time to load a round into the chamber.