Never killed an aoudad, but I hear they are tough animals and would not feel comfortable taking one with a .243

I would feel comfortable hunting any Texas game with a .243. I started hunting with one when I was ten, and continued to use one until I got my first 25-06 when I was in my twenties. I cant seem to use anything else these days. Out of all the deer I killed with that 243, I only remember trailing two deer over thirty yards. Shot placement is key with any cartridge, but more so on the less powerful ones such as the 243 or 223. My most difficult tracking came when I made a good clean shot with a 7MM Rem Magnum right thru the lungs of a 10 point. The shot was about 125 yards, and there was little blood. The bullet cut a perfect .284" tunnel thru the deer, never expanded and exited. That was a two and a half hour track that ended up being nearly a mile. That goes to show that anything is possible even with those powerful cartridges.

Ive killed 300 pound hogs with a .223 . I own guns ranging from .17 to a .50, and I bow hunt. I don't think that trailing a deer 100 yards is uncommon with most calibers/broad heads. Ive hit heart with .308 mag and still had to trail deer. And I hate blowing the shoulder off a perfectly good eating animal. Id be comfortable shooting any game with a .243