I rarely think anything.
After you weigh sort a brick of ammo, you NEED that ammo to do better. A brain plays funny tricks on a man.
Not my first rodeo, I have tried this for years, in different disciplines.
TP is correct, the most likely place to find results are in cheaper ammo. I will go one further, really really cheap ammo.
I have weight sorted and rim sorted SK Plus. I obtained the same results I have always found in sorting match ammo. No discernable difference.
Someone over on Accurrate Shooter or Rimfire central debunked weight sorted ammo a few years back. They actually used a very large statistical sample and shot ALL the ammunition. They had a control group as well. The control shot exactly the same as the sorted...exactlyEDIT

actually...if memory serves I think the control actually shot a bit better..pretty sure) Still I tried it again, after failing so many times before. I weighed them within .02 grains, that is .02 grains in case you didn't hear it the first time. 2 hundredths of a grain.
Unless you have a sorted batch and a control batch, and approach the whole thing with scientific method, your assumptions and proclivities will skew the results.
Sorry guys. Not calling anyone a liar, but I seriously doubt your methods and your science. I have had that pony buck me enough to know it is a huge waste of time for me. The only reason I ever weighed any again, was from desperation, and I had some spare time.