I hunt with guys like that.
I'm not a natural shot. When I was in in boot camp, I qualified 'marksman' which is the lowest you can qualify in the Marines...otherwise you are an 'unq', unqualified, which means you get to stay back while your platoon moves on - and you are give 'extra incentive' while you do get to qualify. Anyways, 'marksman' badge is also referred to as a 'toilet seat'.
Still, I worked VERY hard at it, qualified 'expert' every time after, and ended up being selected to go to sniper school. I finished in the bottom 1/3 of my class, because there were so many guys there who were just so darn good - naturals, if you will.
Don't be mislead, I am a very good shot, but these guys I hunt with were all raised hunting, in the woods, and I just wasn't. When it's been a while, my skills erode. I can tell.
I gave a couple of the older guys some ammo that I reloaded. 50 rounds of 7mm mag, 160gr Accubonds, which they said should last them 10 or 12 YEARS. It's two brothers, and they never practice during the year. They sight in one or two rounds at the most, maybe every couple of years, and rarely miss. So, yeah, maybe 10 years. This year, one killed an elk and bear, the other a deer. Three shots, three kills - and a typical year for them - they never wound anything. They were both very poor growing up, and they think practicing is wasting ammo. They didn't go to sniper school: one was in the Air Force (hardly a bastion of a marksmanship program - no offense) and the other wasn't ever in the military at all, but I'd bet they can both out shoot me 99 days out of a 100.
Tom