I drop mag
Rack
Lock open
Inspect
Then run the slide several times just to triple check no rounds come ejecting out
I wonder at this...
Given the order named, just WHERE are any additional rounds going to come from????
Personally, I drop the magazine, then lock the slide back, on every gun I have that allows that manner of operation.
Some do not.
Not every gun one owns is a duty pistol class semi auto. Some pocket guns don't have a hold open feature, unless there is an empty magazine in place. Some don't have one at all.
I see nothing useful that multiple racking of the slide, on what should be an empty gun, does. If the chambered round doesn't come out the first time, because of some mechanical failure (broken extractor) what makes you think it will come out the 2nd, 3rd, or 25th time you rack the slide????
That is why a visual/tactile check is ALSO done.
I will also add my voice to the argument to not load by dropping a round in the chamber and letting the slide close on it. MANY designs are not made for this, including the original 1911A1s. It CAN cause damage, unless you have a gun made with a pivoting extractor. Those guns can handle it, but other designs are at risk when you do it.
The fact that you might get away with it for 20+ years without damage is simply a testament to the durability of the gun parts, and no guarantee that the NEXT time you do it, something won't break.
I have one semi auto which does have a pivoting extractor, and the owners manual still FORBIDS letting the bolt slam home on a loaded round in the chamber! Not because of the risk of damage to the extractor, but because of the risk of accidental discharge from the firing pin slamming into the primer!
(no, its not a duty class semi auto, so what??) Habits matter, and if you have more than just one design of firearm (and I do) one should only use those habits and practices that are safe in ALL of them.
otherwise, you are setting yourself up for a failure of some kind, or worse, an accident.
If a gun is meant to be fed from the magazine, FEED IT FROM THE MAGAZINE, otherwise you are abusing it, and risking damage.