I second Mike70560's opinion about North Fork 300 grain bonded soft points. I recovered two of their 300 grain bullets, one from a Cape buffalo. They all weighed 290 or 291 grains.
At first I had feeding problems. North Fork advised me to seat them a bit deeper, which solved the problem. Crimping in the groove is simply not necessary for a .375 H&H.
Two pieces of advice not given by the other posters:
1. Read "Africa's Most Dangerous" by Kevin Robertson.
2. In pricing hunts, remember that you often get what you pay for. Request at least five references and check them out.