Steve, I was using a Ruger 7mm magnum and the buck was only at 100 to 150 yards. I realize that a 7mm is pretty big for an antelope but it was all that I had at the time. I had given my other rifles to step children. I just recently bought me a Savage 25.06 with the accutrigger. Haven't even shot it yet but I'd like to try it out on some coyotes. Back to the buck antelope. I shot him in the neck and broke his spine. He had expired before I could travel up to him. A neck shot turned out to be very humane in this instance. I may have told you wrong on the area. I can't find my area map. But my tag was good for both unit 67 and 68. I've never been in unit 141 but always love to see new country. Later, fatrooster.