It's hard to go wrong with the RCBS 350gr. design. I don't know why anyone would think the Taylor wasn't good for cast bullets, it ought to be just about ideal. If you've got a good barrel you should be able to run it pretty close to full throttle. Just size the bullets to fit the throat, and have at it. BTW, those bullets cast out of 20:1, drilled with a big hollow point, and shot at 1700 fps or so really do a number on groundhogs!