Some folks do load more than 100 grains of loose powder to obtain the best results in their rifle as needed for their own hunting environment. And some pellets can match or better that.
I don't see how anyone can honestly claim that loose is always better.
We all know that every gun and load is different, and so are different pellets including the new White Hots.
I don't suppose that anyone can claim to have shot every rifle under every condition imaginable?
Why is 80 grains of loose powder always the best load, or 90 or 100?
It's clearly not for some guns and some bullets require more RPM's to stabilize.
Maybe folks can benefit from the reported experiences of others enough to know that there's no single rule that applies to all muzzle loaders.
There's always going to be a fringe distance where a few more foot pounds of energy and velocity will be of benefit and which can make the difference between a kill and a non-kill.
And no one knows what that range will be before they shoot.
Just as no knows or can reasonably predict which load will shoot best in any gun on any given day.
It's always been said that in the end it's the nut behind the trigger that makes the difference.
As far as barrel harmonics goes, there's velocity ranges that work better than others.
Maybe some velocities can be duplicated by a load of lose powder as well as a variety of pellet loadings or different brands.
And the same applies for bullets, primers, ballistic bridge sub-bases and other projectile loading technologies, like varieties of conicals and their compositions, wads, lubricants, new style breech plugs & nipples, primed brass centerfire cartridge ignition sytems, bore coatings, cyrogenic barrel treatment, barrel & receiver beddings, bore polishing, chemical bore treatments, twist rates and so on.
Something may work when using one variable or combinations of variables and not with another, or others or vice versa.
So maybe we should all remain open minded about not just the bad experiences that folks have reportedly had with pellets, but also remember that there's been a multitude of good experiences reported by pellet users too.
Minute of angle shooting at long range is pretty hard to dispute even though many folks can't personally obtain those results with pellets. But that doesn't mean that their reported results are untrue or inaccurate.
My suggestion is to acknowledge that sometimes pellets can perform just as good as loose and at other times even better.
I would assert that statements to the contrary are unscientific and not supported by facts, but rather are only based on personal opinion and experience.
While personal experience is important, it's limited and doesn't reveal all of the facts.
Maybe some folks can even mix & match loads using both loose powder and pellets to obtain best results?
How would anyone really know or be able to predict if that wouldn't work or not if no one has even bothered to try it?