One should be a tiny bit skeptical of the velocities. They are within about 100 ft/sec of factory loads for the .260 Remington, which has almost 50% more powder capacity and has a max pressure that is 5,000 psi higher.
Yup. They were pushing that little case awfully hard. I looked into it too but MGM wouldn't chamber it in a Contender so my interest ended there. I like wildcats as much as anyone but stop short of giving them magical powers. Often they get a lot more tame with pressure tested data.