new Vaqueros are not rated for full house loads like you can shoot in a blackhawk. I have a Vaquero and really like it, 5 1/2 barrel. I shoot 255gr Keith style semi wadcutters at 900fps, loaded over Unique powder.
I had a Vaquero in 44 magnum. I wish I had known it wasn't rated for "full house" loads. I shot it for years with no problems. What makes you say the Vaquero isn't rated for "full house" loads?
probably because Ruger said they ain't...
old Vaqueros had a bigger frame and could handle full power loads..
new Vaqueros have a smaller frame and Ruger(and everyone else with brains) don't advise using the full, hot loads in them.