I have a question regarding hunting with the Sierra Match King. I currently shoot these (190gr) in my 300 Remington Ultra Mag Sendero. I get excellent accuracy (haven't even spent time working up loads yet....just straight out of the Hornady manual). I have read that these are excellent for long range hunting. at what range can these bullets be used? What would be the minimum yardage that would make this bullet fail? In other words, I may need to work up some loads for a high performance hunting bullet for shots which may be closer.