Can't help with a 22" barrel but my 28" match barrel runs 2928 fps with low single digit SD's when loaded with H4350 and berger 135's. There's probably more speed to be had but it's shooting too good to mess with it.
My hunting rifle with a 24" barrel has an average velocity of 2851 and an SD...
Looks interesting. We're trying the Stanley pour over set this season. I can certainly see where the Jogo would be a substantial weight savings, though.