I know Terry has tweaked this thread a few times as it has gone astray a few times... Which they usually do... I've read through the thread a few times and have been reluctant to post, but finally will...
My most comfortable weight range is right around 70#... But have hunted and killed game with bows from 57# - 92#... I've recently went to one style of bow for the interest of consistency with my shooting... Some of what I would call "super heavy" bows have moved on... I.E. bows over 90#...
Actually just today I received a set of limbs that are 82# and spent the afternoon getting to know them. 750'ish grain Gold Tip that was/is nock and feathers to the target time and time again made it easy to shoot probably 200 plus arrows during the session... 82# sounds like a lot to some, but to me it was simply a setup with an arrow a little over 9 GPP... Shot the same as my 62# bow with an arrow that is a little over 9 GPP... Same point of aim, just hits harder...
Is that setup needed for deer? Probably not, but could it be needed for Elk, Moose, Bear, or if I'd be lucky enough in my life some of the African species? Sure...
I gear my setup for the task at hand... Type of critter I'm chasing, weather conditions, and time of year... When it's cold I tend to drop down in weight... A lot easier to get back, and make an accurate shot after spending several hours on stand in cold temps... And now that all, well mostly all of my bows are so similar (same make, grip, shooting characteristics, and cast), switching between different weight bows is a very smooth transition as long as GPP are the same or at least close...
Hunt smart, hunt hard, and use the best setup you can be accurate with for the game you're after... If your honest best is a 40# bow or a 100# bow makes no mind to me... Only you can be the judge of what is your best...