There appears to be an error in the 375's recoil energy number in the table.
Backing in to the numbers using the JBM Ballistics calculator
The 300 H&H would have to weigh only 7.83 pounds to create 46.0 pounds of recoil energy.
(300 grain bullet and 67 grains of powder are the other two inputs I used.)
A10.5 pound 375 H&H rifle would calculate as only 34.3 Pounds of recoil energy.
The 9.3x62 numbers look appear to be a little light unless you allow for a heavy rifle.
Based on my 9.3's weight of 9.5 pounds (probably heavier that most) and an estimated 62 grains of RL17, a 286 grain bullet at 2,396 fps calculates 31.8 pounds of recoil energy.
www.jbmballistics.com
Edit: Being an old retired bean counter, my guess is someone came up with 36.7 pounds energy for the 375 H&H and typed it in incorrectly as 46.7.