Confidence in your equipment means a lot. Now I've never shot anything with a PRB that I didn't find. Sometimes it took until the next day. My friend shot a nice fat doe one time at about 60 yards. He couldn't believe he missed the deer as it showed no sign of a hit. Luckily there was snow in the ground and we tracked it and found it in a pile a bit over 100 yards into the brush. It never bled a single drop but was hit behind the shoulder through both lungs.
That was a .490 PRB over 100 gr of FFFg way back when we could only use balls in PA.
Now - I'm still waiting to bust something with my .58 using a PRB.
I wish I had a .58 in a flinter.