Yeah I was looking at the 6.5x55 as well. On the subject of american made ammo...
U.S ammunition brands are typically very poor performers. True velocities from 22 to 24” barrels for Winchester, Federal and PMC 140 grain loads and run between 2400fps and 2450fps. At close ranges, these velocities cause little disruption to conventional bullets on impact, giving up to 80% weight retention and outstanding penetration on medium game. That said beyond 50 yards these brands of ammunition offer very poor shock and slow kills are common.
Add me to the skeptics column too. I also think he places way too much emphasis on BC, which means little at hunting distances. That said, good on him for making a website and speaking his mind.