Reading up says the New Vaquero can handle loads in the 14-23k psi range. The original Vaquero was a larger frame and can handle 30k psi. Those are recommendations, but I’ll have to watch. Most of what I shoot out of that pistol will be pretty tame I’m sure. These hollow points are probably not going to be fired all that often. May run a box through just to see how they go....and that leaves me 180 more of them to sit on a shelf.