About five years ago I was boar hunting down in Oklahoma. It was the end of the day and I was about to pack it in because I wasn't seeing anything that I wanted to shoot. So, I get up and and start to walk back to my cabin. As I'm walking back, I see a huge hog just in the tree line about 300 meters away. Now, I had a savage .300 winmag short. 300 meters would have been easy breezy for a win mag. The thing was, it was dusk, the hog was behind a large log and it looked to be feeding. All I could see through the scope was the hog head pop up every few seconds, but no real shot.
Note* If you've never hunted boars before it's important to note that they are tough bastards. If you don't hit them exactly in the heart or brain, they will run off and die 2 months later. They have, essentially armor plating in bone around their rib cage and on top of their head.
Anyways, I watching this boar for about 2 minutes hoping that it will move to a better location so I can get a clean shot. Nope, he just stays put and keeps feeding. Then, in the background, I can see his pack start to move and I knew he was going to go deeper into the woods if I didn't down him then and there. So, I exhaled and then held my breath, steadied the sight picture right behind where I thought the eye was behind the log. The rifle bucked in my shoulder as I was startled by the recoil. I can't tell if I hit the pig or not, all I see is a big dead log on the ground where the pig had been. So, I started to walk up to the log thinking that I had missed. I pulled my map out to mark my location so I could possibly track that big boar the next morning. I got to the log and to my amazement there was a huge 350lb male boar, deader than a doornail, with a small hole right behind the eye. No exit wound (this tells you how thick their skulls really are...a .300 win mag is moving at over 3200 feet per second and it didn't even go through the pigs skull) but the bullet had gone straight into its' brain and killed him instantly. I couldn't have miracled a cleaner or luckier kill than that.
So, from 300 meters out I killed a boar in low light conditions, with only an idea of where the boar was behind the log as it lowered its' head to feed and I hit it exactly where I wanted to.