Did you order the barrel yet? There's no science to prove it, and equally you have nothing to disprove it. Could it be that there are some shooters out there that have had premium quality barrels by the truck load over decades that come to a conclusion from experience? The same guys that have had some problem barrels that copper foul that were ultra smooth that formed their opinion. Could it be that a guy that's been in the barrel making business for nearly 40 years has some experience with barrels that have fouled and has formulated his opinion based upon experience? Nah, no way that could have ever happened in either case. Again, if your theory that the smoother the barrel finish. the less likely the barrel is to foul then how do you explain why no barrel maker tries to gain an advantage on his business competition by lapping to a 2000 grit finish. If it was a superior product competitive shooters would flock to them in droves. There's a reason they don't lap to those micro finishes. Butch says Shilen laps with 320 grit. I know there's barrels that are lapped with 180 aluminum oxide that yields a smooth enough surface to perform well without fouling. Wonder why that is?