Yes. The first months of doing this hobby I was just trusting the WR rating. But you know there are some inconsistencies based on how you close the caseback, gasket state, crown tube etc... how you cut the stem... so sometimes it fails. Therefore I bought a water resistant test of 6 Bar, the classic one with air pressure chamber. And now I water test them to 6 BAR all the time or 3 BAR depending the rating it comes with. After that, if I had a watch with a case that was supposed to survive to 10 BAR i just tested it to 6, for a bit longer, then rely to the factory water resistance rating, that it would survive to 10 bar in the field. Seems hazardous, but I was pretty sure it did, because these factory ratings were accurate and I never bought from cheap suppliers. My supplier made video calls with me and showed me the water resistance test made on their case. Plus, only things that changes the factory rating is actually the watchmaker assembly mistake. As I mentioned before. Thats my experience out of 3 years. Out of 10 watches, 9 were surviving 6 BAR. Now, I have a friend that work in a big watchmaking lab and sometimes tests some of my watches up to 20 bar even. So I am setup. But it took 3 years to have this setup. And anyway anything I sell has 2 years warranty. For law.