Fortunately for me I can draw 72# without a problem.Even though I am only 155# myself.I am a concrete finisher byu trade so i am strong yet skinny.I used to shoot 78 pouinds.Until I was hunting one very cold day and had a huge problem drawing my bow.So I turned it down that night when I got home and was still cold.Drew it a few times to make sure I could draw it sitting without difficulty.So yes I know exactly what you are talking about.my Step son was a prime example of what you are talking about.Even though he is 6'6" and 280# he grew so quickly that he was akward and had trouble drawing back 55# last year.He was a few inches shorter but still weighed in at 250.He was trying to draw my bow with my weight.Needless to say he shook so much he couldnt of drew on a deer if his life deppened on it.He is much stronger now and actually draws my bow easily.He said I dont want my bow to be that hard to pull.He has wized up considerably to knowing his limits and knowing what he can and cant do.He knows he can draw 65# without scaring every deer off that is anywhere close to him.Its all about knowing your limits and living by them.