With one of the powders on the list, maybe. Look at the chart closer and compare the numbers, it's pretty clear the extrapolated (at best) all the other powders from whichever one they tested. I'm betting their test was only one sample as well, with an apparently very slow barrel. The velocity numbers in that chart seem to be at least 200-250 fps slow compared to a good barrel.
Part of my profession is analyzing data like this. Just because it's published data from a reputable company (and I do like Hornady as a company) doesn't mean it's good data. When you see red flags in the data like on that chart, it's wise to do more research before accepting it.
It blows my mind a company of this size would release data without basic statistical analysis expertise. If the load data and velocity data is single sample, that is beyond baffling to me. I would expect the velocity curve would be from the highest performing/suggested powder if only one was given, but definitely as an average across multiple shots. That said, I would also have expected all of the powder options to be mapped. What’s the cost, while cutting down the barrel, to run through a few test cartridges in each powder vs. just one? I would not expect multiple barrels, though it would be nice.
I’m still surprised at the lack of some powders from the chart. For a new cartridge, I’d expect all of them with the appropriate burn rate and properties to be tested. I’m glad they tested more than I’ve seen for some other cartridges, but why not all? Surely in comparison to the cost of standardizing a cartridge it isn’t cost. What’s a few thousand rounds and a few dozen pounds of powder?
I’m still waiting on my 10.5” Bartlein barrel, hopefully it will arrive soon so I can run my own tests and compare to an 18” Bartlein produced on the same reamer to the same specs. I can’t test the barrel lengths between these two, but it’ll be interesting to see the delta.