Regarding need for a big bore able to stomp a Tyrannosaurus into the dirt...

Technically there is plenty of need for heavy rifles, in virtually every country on earth. I've been on the receiving end of affection from a few very upset cattle and they can easily kill you as fast as any upset Cape Buffalo. Probably faster, since they were bred for meat production and when properly raised are more heavily muscled than any wild animal.

Given my personal experiences working with large animals since I started helping my grandfather feed the cows at about the age of six, I think heavy rifles should be mandatory equipment for anyone in the cattle business. Most large animal vets are armed with a .308 or a .30/06 but that is because veterinary supply houses sell tranquilizer cartridges in those calibres. Not certain if those rounds work in a standard rifle though and from what I've seen they take a discouragingly long time to have any effect.

Granted my opinion is probably highly inflammatory to a lot of farmers, ranchers, station owners, and hunters, but I've been uncomfortably close to getting killed on a couple of occasions and only managed to avoid it via a miracle. Those upset "domestic" animals did not calm down very quickly either. Almost everyone I've ever known who has worked with large animals for years has had a few similar experiences.

Most who read this are probably hunting regularly on properties with cattle present. Those large domestics are not always friendly and that should be kept in mind when deciding to pack a rifle designed for the specific wild animal you intend to hunt.

Richard.