I have been one of the lucky ones to read msot of his books and he talks about shooting caribou 600 yards out with the then new 41 mag. What would the public do today if someone posted a story about accurately popping caribou 600 yards and killing them. So what brings this up with out hi jacking the other post people start spouting how un ethical it is to shoot animals 500, 600 or even 1,000 yds out. But here we have the famed Elmer Keith doing it with a pistol. In his book he tells of the time someone called him out and said he was lying and could not shoot that far, so he invited this individual out to his home in Idaho took him out into his back yard and took his 44 mag and started shooting at a metal plate 600 yds out and was hitting it everytime. So Elmer was very capapble of doing this. So with that if you practice and know your limits fire away. Go watch some of PSE clips on you tube and see how far guys are shooting deer with the X-force there is one on there at 100 plus yards. I have shot with some the PSE guys at archery shoots in Arizona and wow those boys can shoot and they have the equipement to do it. All it takes is lots of practice and I mean lots of it. Understandable majority of folks up here including me will never be able to practice 500 to 1,000yds due to there being no ranges that are accessable to the public. One last note I bet you, no one on here would tell Good ol Elmer Kieth what he was doing was unethical or wrong heck you all would be begging for his autograph.