i've seen one gun shoot pbs reliably it's a 45 cal optima. They didn't work for me in a knight (older inline the 209 conversion), remington genesis, traditions pursuit xlt, or an optima 50 cal. I've always had luck with any of the saboted bullets; SSTs, XTPs, Gold Dots, and we recently tried the non saboted FPB and had good luck.
I have a couple hundred 300 grain XTPs and Gold Dots with mmp sabots so i'll be useing them for a while. I always want to try something different but end up back with the cheap XTPs or Gold Dots.