From what I've heard from experienced antelope hunters, I got lucky with this guy. He was only 88 yards away, facing me.
Congrats. I hunt out in the Casper area every few years. Nice antelope you took.
As far as distance....it varies. I've taken them out to 300 yards and as close as 15 yards. As you know, the land scape can provide lots of relief out there and it is possible to get pretty close to them at times.
As far as receipes.... take the backstrap, wrap it in bacon, add a little salt, pepper and garlic and fry it with some butter and onions. Nothing better.