My wife's NAT broke 170 fps three shots in a row with her shooting it, such a weenie little speed demon bow. Kind of made me mad because my heavy pignut hickory would not put out the same arrows that fast, but it did blow a 460 grain arrow through a deer like it was not there. Education and common sense can be preached to and ignored by beginners and experienced alike. I would advocate using a heavier bow weight if the person can manage it of course, I have seen experts with lighter bows, 38 to 42 pounds, have numerous efficient kills on their success list. However, I have seen many more folks totally over bowed that could not possibly consider themselves efficient hunters. Knowledge and skill come together to make a setup work for the individual. It is up to the experienced to share their knowledge and up to the beginner to learn what will work for them. It is not up to me to judge by arbitrary guide lines other than to make a suggestion or two. If it is a dead slow solid fiberglass that is 35 pounds, I would advise against using it. If it is a 38 pound speed demon, I try to find the best arrow for it, if it is an 80 pound longbow that the owner cannot pull very far or control, it takes diplomacy and a couple of sessions to find out what the person should be using instead. I knew a man that bought a 100 pound bow because he was bigger than me and I was shooting hundreds of arrows a day with a 90 pounder. If he would have been nicer about it I would have gladly let him use one of my 50 pound bows, but then I warned him as much as possible about not getting a bow that he could not pull. Some people will not listen, they start out this hunting the hard way by learning the hard way.
then there was the compound shooter that walked in with us. he constantly was going on how my wife should be shooting a bow like his. when we got near (24 yards) a fresh round bale he unscrewed his mechanical broadhead and put on a target point, declared his mark and half a life time later released and missed it by a couple of inches. He said "there that is what this bow will do." My wife then shot her three blunts in about 12 seconds on top of his arrow and said "that is what this bow will do". I expect one day he will be joining our ranks, I have never had anyone badger me with as many questions as he has since that day.