"... With A Jack Weigand Base, and a 30mm UltraDot no telling how well it would shoot. Lots of good things about a 357 Magnum. Reasonably cheap to practice with is high on the list. Mild Recoiling. Good bullets to reload with that are way cheaper than the bigger stuff. You might play with some 300MP or H110 powder. You should be able to get the velocity you are looking for with a little experimentation.
Keep up the good work. Good write up also.