The 60 inch Kudu is, of course, the Holy Grail of Kudu hunting..The problem is the quality of these hunts has been diluted with fencing and breeding programs, thus there are 60 inchers and there are 60 inchers, much the same as our Whitetail deer...
Those from behind a high fence cannot be recorded in B&C, therefore don't count in the eyes of some...Wild 60 inch Kudu are rare as hens teeth, but they do exist in certain areas of So. Africa, Zimbabwe, Zambia and Mozambique, and a few other places, and in those areas it is remote, hard to get to them, very hard to hunt, and you must be in very good condition and be willing to suffer the hardships that a true hunt can dish out..It will test your metal, but the end result is one of the all time rushes, The Kudu is the Grey Ghost and the ultimate challenge when met and challenged on his own turf and on his terms.
I personally have shot a number of near 60 inch Kudu, and one 60 incher, mostly on fenced ranches of about 15,000 to 75,000 acres and a lesser number of them on unfenced concessions.
Also, there is a size difference in the Great Southern Kudu of Zim, Moz, and the Eastern Cape of Southern So. AFrica and as a rule the Eastern Cape is the smaller, but there have been exceptions..
Those big black Kudu of Mozambique are the Holy Grail of Kudu and the record book has at least one Lion Kill that went 72 inches as I recall, and others near that number..Those kills date back some years and do those big bulls still survive there..I know that at least one does.