I think a .270 is perfectly adequate for kudu. Even though a kudu is a substantial animal it's not a particularly tough one (in fact, I'd say it isn't tough at all - a bushbuck is a tougher animal than a kudu), and a well placed .270 would I suspect reliably bring one down. My concern with a .270 is that while it would be great for kudu and springbuck for example, I wouldn't call it adequate for many other plains game animals which are both larger and tougher. For example, I think a .270 would be marginal on blue wildebeest and zebra, let alone eland, which can run all day after being poorly hit. So if I had to bring only one rifle to Africa, it would likely start with a "3" rather than a "2". Having said that, we come back to shot placement. If you can thread a .270 into the heart of an eland, it will die without a doubt. You asked for feedback on the springbuck - I've shot lots, and your looks like a "snorter" as they say! And your kudu is no slouch either. You should be very pleased. Looking forward to the balance!