Firstly the link doesn't work. Because it is fictious. I created it. Read the words in the link.

But the gist of the article includes how the older cartridges are downloaded in factory ammo. Therefore it is inferior. Such as X fps. Low! But XYZ fps is possible with handloads.

Now we talk about the new cartridge. Obviously the best. But a lot of time fail to record any real ballistics! Why? Perhaps not up to the XYZ velocity ...

PS apologies to Creedmoor lovers on NE. The 130 year old Swede is still better.

PPS the .375 H&H Mag is still the greatest all rounder.