Powders and Loads

Not to muddy waters, but interesting video here. The author seems to claim that powder doesn't matter as long as the velocity matches the node. In other words the node is the same for all powders. It comes at the 7 minute mark. Since I'm about out of varget, I will be testing this.
 
Zeroed....spend some time comparing Pistol and rifle loads in the same caliber....just saying.....some of your answer is in there.
 
That's interesting. Am I correct in interpreting the video that for a given bullet, say, 150gr Hornady Spire in .270, a "flat" velocity node of 2700 fps (example) with H4831 can be predicted to be the most accurate because there is little variation in speed 0.2gr above and below that particular charge, and one can expect/predict the same accuracy with a load of H414 or H4350, etc., as long as the velocity produced is 2700 fps with both those other powders?
 
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