Long range hunting shot of 500yards - Winchester Copper Impact 6.8 Western 162 Grain Copper Extreme Point Brass Cased Centerfire Rifle Ammunition

I made the first shot at 500 yds on a 10 pt Buck with the 162g Copper Impact, at an estimated energy about 1600 ft lbs,…the bullet struck the Buck in the upper Lung area. Buck moved to bed near brushy cypress thicket and after stalking 2nd shot at about 85yds dropped the Buck. I would give 5 Stars for any use of this 6.8 Western Cartridge and at ranges of 300 yds or less. I determined the first copper bullet did not mushroom more than 9-10 mm, due to reduced speed and energy at 500 yds, therefore 4 Stars.