Simple reason for not taking those long shots is its not necessary. I'm not saying their aren't proficient "shooters" out there, but most of us hunters can not consistently make a 700 (or 300, 400 or 500) yards shot, even with substantial practice. I shot every day for 5 years while working for a premier firearms company and I will say that taking a shot of that distance, takes more than the like of a "super magnum" rifle and even practice, all stars have to be aligned, so to speak. There are just too many variables at those distances to overcome.
Can it be done, yes, are the firearms today capable, yes, but its just not necessary and from my opinion the animal deserves a little more respect than flinging lead at him from a half a mile away...
During that time at said firearms company, I killed 2 animals over 500 yards. I hunted over 150 days a year and only 2 animals required that long of a shot. Simply put, its not necessary.
My opinion, I know, but we will get more respect from the non-hunting people and hunters alike by taking ethical, humane shots than pretending to be animal snipers potentially leaving game wounded, crippled, lame or to a slow death.
I work in the hunting industry and I know a lot of people who can make these long shots, but my opinion stands that its not necessary.
Sorry to rant, but its just a sore spot for me!