Those aren't comparable bullets though, these are all monometal designs except for Berger. Who else makes heavy, high BC lead core bullets for the 6.5 and 270? A 160gr 6.5mm and 170gr 270 solid copper bullet requires highly specialized twists to function. A lead core bullet with a similar weight and BC will require a more conventional rifling twist.
It's not as if I can walk into a store and pickup a box of the 155gr Berger's in 6.5 mm that's been "on the way" for a few years now. The 150 SMK is out there and available but the heavier bullets are a better option in really overbore chamberings. The same goes for the heavy for caliber lead core 270 bullets. Add to that the cost difference between solid copper and lead core bullets and it's really not an equal comparison.