You are correct in that quote. However, the original loading was from a 30 inch proof barrel. Most barrels today are about 24 inches or so, therefore those same loads would probably chroney at about 2050- 2100 in the shorter barrels of today. So work up from that point and stop when you get the best regulation. Four to six grains of powder make a huge difference in felt recoil in the 500 NE. I once fired a box of 500 NE from Superior Ammo and they all chronied around 2050 fps.

Geronimo