I'm with Roger and mudhen and JB on this. The one nilgai cow I've killed was double-lunged with a 140 gr AB out of a 270 WSM. She ran 120 yards and fell down and couldn't get up again. I had to give her a finishing shot, but if I'd just let her lie there for another 10 minutes I expect she'd have been dead. Her lungs were totally shredded.

Nilgai is not some magical mystery species that requires uber-powerful rifles. They fall to good shot placement with decent bullets from ant reasonable "elk caliber".

Last edited by DocRocket; 06/14/16.
"I'm gonna have to science the schit out of this." Mark Watney, Sol 59, Mars