Seventy-nine Nilgai were collected for research on food habits and meat quality on the King Ranch during a study in 1969-1972. Rifles used were chambered in .243, .270, 7mm Magnum and .30-06, all with factory ammunition. All were one-shot kills, mostly with neck shots. Another 15 were collected during a disease study in the winter of 1972-1973 using a .30-06 with 165-grain Nosler hand loads.

I have seen no evidence that they have somehow become bullet-proof since then. Take whatever rifle you can shoot accurately with a bullet that will reliably penetrate and expand.

Ben

Some days it takes most of the day for me to do practically nothing...