maniacmechanic, on 25 October 2010 - 06:42 PM, said:
Show me the Science ; where you can take a not perfectly round object filled with a semi-viscous liquid , on & on & on

You need to shoot a HammerHead then and tell me you do not notice a difference.
The barrels speak for themselves once you use them.
As for brass, I have no idea if it is going to help. As stated, the elipticle honning done by Palmers is part of the performace they generate as well as the ability to shoot anything round.
The added weight of the brass will tend to reduce movement of the gun duing use, so that is going to help. I would imagine brass does help a bit....and they do look nice to boot.