I did some Springbok culling last year and made a conscious effort to alter my shot placement and note the results. The sample size was small but they were shot at virtually identical distances using the same load. I was not surprised that shooting them in the shoulder piled them up faster. I always try to break some bones if I can.
Aren't African animals lungs, typically further forward, than Nth American game ?
Yessir. Low, through the shoulder is a heart shot for those guys. I did find that if you put a good bullet through the heart/lung area on those plains game, they died just as easily as any other big game animal. One thing though, is that on marginal hits those African trackers are the dambdest thing you've ever seen when they go to work . I made a couple of very marginal shots and those guys were truly amazing, never seen anything like their ability to find wounded animals.
