I've used them in the form of the old Sierra MK for punching paper, but never shot a bambi with one. The pointy bullet that has taken a number of deer from a 340 on our property is the Hornady 150 interlock. It put deer on the ground quite reliably. As for load data, I use 150 recipes for the 30 wcf and chrony the results.
Sierra MK and Prohunters are two different bullets. I don't think I'd try to kill a deer with a MK. I don't know what it would do but it's not designed to expand on game. It's designed for accuracy on paper. But I've never tried it. For all I know it may be the best deer bullet on the planet. But I just don't know that so personally, I wouldn't go there.
