I know a gentleman in WesterN Wyoming that has lived there his whole life. He is about 70 and has killed an incredible amount of elk in that time. He recently moved up to a Creedmore and 129 gr Interlocks for elk because he feels his shooting is not what it once was, up til three years ago all he used was a .243 with 100 gr. interlocks. Yes he placed his shots and had time. but in 60 plus years of hunting he never switched until age and eye sight got to him.....