They do have to be adjusted and if you get them right you won't have inverted primers but the tube will take the entire time to fill as it will be culling "correct" primers too if they are not just right to enter.
A non issue for me because I fill it up and get back to loading. If you are going to stop and watch it, I am with GJS, the vibra primes go on sale for $25 a few times a year and worth it.