Getting close on antelopes is tough out here. There is no cover and the can see you coming a long way off. It is possible to get relatively close using blinds and setting up over water or where they go under fences, but if your stalking be prepared to work hard to get within 400 yards and even harder to close within 300. Trust me, this isn't target practice, although when I moved out here I sort of thought along those lines
I have such good glass on my rifles because I don't like to guess where I'm shooting, I prefer exact shot placement even way out there. I use a range finder, ballistics program and kestrel when I'm in the field hunting, elevation can range from 6000 to 8000 feet in a hurry, and the winds are always there and few trees to block them.they can be 5mph left at your shooting position, 15 mph right at 200 yards and 10mph left at the target, so reading mirage and other wind indicators are key to making clean hits.
Do I need all the equipment etc? Yeah I think so, I have adapted to the conditions out here, changing from the idea that I never needed any of this to understanding how hard it is to hit, reliably, put to 400 plus yards. And realizing that unless I wanted to sit in a blind over a water hole all day and just wait for an animal to wander by I was never going to get a 100 yard shot on a speed goat.
Of course your experience may vary, you might be a much better stalker than I am out have a better guide (I actually have never had a guided hunt, which could be the first of many things I'm doing wrong) or just get lucky. I have just come to expect 200 yard minimum shots, and more likely 400 plus.