Gator, you are going to get answers from 40 lbs up to 95 lbs.
Bottom line, YOU can only shoot whatever you can handle and be accurate.
On large animals, shoot the highest poundage bow you feel comfortable with and couple that with heavier weight arrows (heavier arrows limit downrange 'spot on' - in other words, your point of aim or distance beyond which the arrow begins to drop significantly gets closer to you)but the benefit is its like adding poundage to your bow because you get greater momentum downrange..in other words, resistance to stopping the arrow goes higher with more weight.
Shoot what you CAN well, and add arrow weight to get up around 10-12 grains lb of draw weight, a cut on contact broadhead that is extremely sharp, and put it where its supposed to go.
Everything will then take care of itself.