About this close to a Brown Bear...
For Grizzly Bears, one year 2 friends and I had our hunting camp at the end of a Forest Service road near West Yellowstone, MT. We had the quarters of 2 bull elk and a bull moose hanging in the stock rack in the back of my pick up.
One night just before turning in, I went out of the tent to check my horses, at the top of the road cutbank, less than 10 yds from our tent, a grizzly woofed and clicked his teeth at me. I had a flash light in my left hand and drew my .44 Ruger with my right hand and fired a shot over the bear's head. No reaction from the bear, so I shot again, hitting the trunk of the pine tree next to him. Again no reaction from the bear.
So I holstered my .44, bent down and picked up a golf ball size rock that I threw and hit him and he ran off into the darkness.
There was another camp about 1/4 mile from ours, and they also had an elk hanging. 5-10 minutes after the bear ran away from our camp we heard six or so quick pistol (?) shots from that other camp, and about a half hour later we saw their headlights as they had broke camp and left.
The next morning I rode one of my horses, followed the bear's track to the other camp where there was then an occasional drop of blood in the snow. I followed the tracks to the top of the forest clear cut that he walked though, then he walked back in the direction of my camp. We also left the next day or day after.
The grizzly had a radio collar and an ear tag, and when we reported the incident, I found out that he had been a problem bear near Cooke City and trapped there then released in the area where we were camped. I later heard that the Grizzly Study Team radio tracked him to his denning site a few miles from where I saw him, and the next spring they found his collar, but not him.