His tables are simply a tool or chart to campare one rifle to another in a simular way. I use them because if looking into a new caliber or cartridge, it a place to start. Nothing short of firing a specific rifle with a specific load will deliver the true story.. Even then it depends on how the rifle fits the shooter. The Marlins and 700 Remingtons fit me the best in rifles of the same weight, they have less felt recoil to me. I had a 700 Classic in 300 Win Mag that didn't seem to bother me much at all. I later bought a Savage in the same caliber and it was brutal to say the best. A couple range sessions and it was on the used rifle shelf.