Why Deer Hunters Should Sight In Their Rifle

I used to hunt when I was a kid with my dad. I guess from the time I was 13 and old enough to sit on a stand by myself until I turned 20 I hunted. I'll tell you straight up siting in your gun sucks. Shoot, walk down to see where you hit, walk back adjust. Repeat into infinity and hope you didn't flinch. Sighting in sucks but it's essential if you want to hit "the broadside of a barn". I'm sure after this guy went back to camp he shot 2 boxes of shells at the gun range.