I've only hunted with two PHs. The first I only saw shoot once, missied a difficult shot on a dove with a 300 RUM. He had spent a lifetime of culling game and I had confidence in his ability to shoot. His son who was training to become a PH shot often and practiced a great deal.
The second took several shots while we were hunting, he was one of the worse shots I've ever hunted with. He was shooting a new Blaaaazer and wasn't familar with the rifle.
While hunting with the second guide we were driving to see the rhino herd on a RSA gamefarm. We spotted a nice impala ram and took off into the scrub for a possible shot. After a considerable time the guide asked me why I kept looking around so much. I told him I was looking for rhino, with a surprised look he told me that was a good idea. We returned to the truck and proceeded to the rhino feeding area, a short distance away.
