I use a PRB from the early 60,s until 99 I went through the calibers and found I liked the 54 from that time until I switched to inlines I never had any problem. I took a bear that dress out 308# with one shot at 177 yds. many good size Northern IL deer and a dozen or so hogs two of the deer were over a 150 yds.
Comparing PB to PRB is a basic fallacy a PRB is a decent load and using the appropriate size worked the world over for 400 or 500 years.
Also all PB are not created equal at least 2 or 3 of the heaviest ones should have the potential, if they work well in your gun. What blows me away is people spending the same amount of money that a really good bullet costs for the pathetic things.