I have used ER Shaw barrels in the past, they are a fair barrel, about 3/8-1/2 MOA capability. Over the past 4-5 years, their prices have`almost doubled while other barrelmakers' prices have increased about 30%. I use McGowen barrels for my builds, and they are the best barrel for the money. You can get one fluted, but ER Shaw owns the rights to the helical fluting. So you decide, but I don't recommend E R Shaw barrels any more unless you can get it for the same price as the alternative.
Never try to educate someone who resists knowledge at all costs.
But what do I know?