The press-check is something everyone who carries a handgun for serious use should practice. I have seen many...many...people who thought they were "sure" their weapons were chamber loaded when they were not, and vice-versa. It sounds good when you hear guys say "I always know the condition of my firearms", but the fact is that Mr. Murphy eventually comes to call on everyone, including me and you. For a carry gun, the press-check takes away that little bit of doubt as to whether Murphy came to visit while you slept.
The front serrations on some 1911 slides assist somewhat in the newer and, IMO, better, technique for the press-check. The weak hand is brought up from underneath the slide and the slide pressed slightly to the rear by the fingers cupping the slide, just far enough to verify the case is in the chamber, then released. The strong thumb can press forward on the rear of the slide, if necessary, to be certain the slide is all the way forward, then the safety placen in the "on" position. Double action autos are more difficult to check, but selective DA pistols allow cocking the hammer to prevent having to try and overcome the hammer spring tension. (and usually suddendy ejecting the chambered round) DA-only models can be a PITA for this, but you should work with your handgun and dummy rounds until you can get it done. Loaded chamber indicators should never be trusted 100%.
The chamber clearing drill I was taught decades ago by a military match shooter actually included how to catch the round in the palm by "smartly" racking the slide to the rear...ONCE. Fumbling was not allowed! Like many old techniques, we have learned better now. The old 1911 pistols are slightly less prone to having the primer slammed into the ejector due to the fact that the GI design is not extended as are many commercial styles, and designs such as the Glock, Beretta, etc. are smaller and extend even further. (the Glock ejector could probably be used as a stabbing implement with the frame off of the slide!) Hold the gun at arms length, point it in a safe direction for the location you are in and eject the round...let it fall...wherever it falls is safer than catching it.
If the shooter fumbles and brings the slide back several times while attempting to clear the chamber, the case can slip out from under the extractor and wedge itself in the chamber / breech face area (I have seen some do this and allow the slide to close completely...any guesses as to what could happen if an empty mag were inserted and the "empty gun" cycled? Before you say it "can't happen" see reference above to Mr. Murphy.) Fumble often enough and you may get a hole in your hand...the advice above is excellent and 100% correct.
Before anyone here starts to throw stones at others about stupid mistakes with guns, maybe we should see a show of hands as to how many have NEVER done ANYTHING stupid in their life and gotten by with it...or EVER made a mistake...or just had a brain fart. ??? I have seen guys do some pretty dumb things, with and without guns involved, and don't ever recall anyone telling me when asked "why?" that they just woke up that day and decided to do something stupid as shit with a firearm, or a truck, or a drill press. It only takes the blink of an eye, and you can't call the bullet back, and saying "I'm sorry" won't make it go away. So let's ALL be careful out there!
Thanks for posting this Johnphin!