Vihtavuori powders seem to be a little higher priced than other premium powders. I have never tried Vihtavuori and wonder if the extra cost makes it worthwhile.
Some say yes, others no.
I use N320. I believe it was Recoilguy that pointed out that it amounted to an extra penny a round. I think it's worth it. I like that it's a single based powder. I'm a low volume pistol shooter.
On the other hand, I'm using Vectan shotgun powders which amount to a penny a round less...because the higher priced spread doesn't warrant the extra cost. I like that they are single based, also.
I don't know. Maybe Win 231/HP38 is as good. Never used it.