My longest distance shot with my .243 Remington rifle was during an antelope hunt in western South Dakota. I'd climbed up onto stacked hay for a steady rest when I pressed the trigger. At the shot, the buck lay down and died. I paced it off to approx. 347 yards.
For this hunt, my ammo was by Black Hills featuring the 95 grain Ballistic Tip bullet. Deadly accuracy and performance.
Sherwood