brian pearce had an article in handloader a few years ago talking about the new vacquero. It certainly can't be pushed as hard as the old one, but he did list loads above those standard for the old colts etc.
I have a couple of boxes of the big ones from buffalo bore i must have bought ten years ago for a trip into colorado, still haven't used them.
250grains at 950 to 1000 fps works mostly for me, except i do love that 270grain saa scovill bullet.
