I hate to break it to you but I have seen rifles from all manufacturers give problems at the Zimbabwe PH shooting tests. Original mausers, through Winchesters, CZ, Whitworth etc. Mauser based actions often need work to make them feed correctly. Also if you watch youtube hunting videos, you will see a lot of jams on reload on dangerous game. Most PH's will get a gun that works and stick with it.
Ironically, the least problems I have seen are with push feed actions in well practiced hands. Simpler action-no timing needed as long as you dont double stroke it. And I think the excitement of dangerous game (or an exam) is what causes the problem. The only trustworthy action is one that you have used under pressure again and again (and fixed any problems.