One thing about antelope is they are notoriously wimpy. Even with a badly placed shot they don't go very far and then usually stay put. And usually the terrain doesn't provide much in the way of hiding places. Now don't misinterpret. I'm not advocating sloppy shooting, but I think going with a less fragmentary large calibre high speed bullet would work fine since bang-flop doesn't need to be an overriding concern. However, saving what little meat is on those tiny critters should be. Only second to humanely killing them of course. It's a balancing act. Any thoughts on solid match bullets for this job with this gun? I admit to kinda talking out my butt here. I don't care to eat them so I haven't hunted antelope for years.
This guy and I think alike. I have hunted all over the world the last fifty-six years for all kinds of game with just one gun, a sporterized WWII Springfield. Save the money for trips instead of wasting it on toys you really don't need.
I would add a bipod to that rifle if he doesn't already have one. Essential equipment for long range plains game.
My hat's off to the gent for asking this question. Shows he has some ethics.