I am of the opinion that that caliber would only be good if the deer was going to be standing, say, within ten feet of the shooter, even then, the bullet may ricochet off its head or other hard bone.
IMO, a .44 Magnum or .500 Magnum would be more the kind of round I would prefer for shooting deer or black bear.
When I had a .454 Casull, I used to hunt deer and black bear with that. I also used to use a Desert Eagle 50AE that I owned to deer and black bear hunt.
Now, the large caliber pistol I use is my .500 Magnum. I wouldn't even think to hunt deer using my .45 Auto unless there was no other gun around and I was able to set myself up in such a place so as to get a good, clean shot off at less than 10 feet!