Sorry, English is not my native language and I use Google Translate.
The internet is full of videos of people attempting to demonstrate how pellet deformations affect accuracy; few videos actually perform the test scientifically. These are trash videos that just waste your time, or a lifeline for lazy shooters who want the easy way out and want others to give them information that, by pure logic, they can't or don't want.
A pellet only needs to have:
Consistent weight.
Perfect concentricity between the head and the skirt.
The head size should be as identical as possible.
The alloy should be neither too hard nor too soft, so that it can conform to and replicate the rifling of the barrel.
And the skirts shouldn't be terribly damaged. A perfect fit between the pellet head and the barrel is more important than a damaged skirt. The fit of the head will copy and guide the pellet through the barrel, exiting in a straight line. Its concentricity will make it fly in a straight line, and its skirt will seal the air passage to the barrel and provide the exit thrust. If the lead is too hard and the skirt is badly damaged, it won't yield to the air jet and won't seal properly. On the other hand, if the lead is relatively softer, it will yield to the air jet and seal better. It's pure logic; there's no need to beat around the bush. Now, if sorting the pellets one by one and discarding the ones you don't like for whatever reason gives you confidence, go ahead. Here's a video shot in a lab, using low power and probably at 10 meters. The results at that distance are very clear. The greater the distance, the greater the impact aperture.