I shot an eland last summer with a 7 rem mag. One shot and done. My PH led us in on an wonderful 90 minute stalk culminating with crawling to about 100 yards. I had a broadside shot on a relaxed animal. The size of the animal is impressive. Taking the time to insure ideal shot placement I’m certain makes a difference and allows for a smaller rifle. But we all know that doesn’t always happen.