You really don't need a really heavy pulling bow. 65 lbs or better. It's all about keeping the broadheads sharp, and making a good hit. Of course, you need to practice...lots of practice, and confidence.
My dad makes bows. Used to be recurves, but now he makes longbows. They are sweet, beautiful pieces. I would truely love to get a nice buck while using dad's bows. But, they require more practice time than I have. You need to shoot 15-20 arrows a day, everyday to have the confidence in your shot. I just don't have that kind of time, work and kids stuff.
I just was NOT confident in killing a deer with dad's bow, practice time, range of shot, angle of shot, instinct shooting, overcoming buck fever, and I'd missed several for several years. NO CONFIDENCE.
Last year, after missing several deer over the previous 6 years trying to get a deer with dad's bow, I switched back to my 55 lb compound. I got a new release, practiced a month or so before season...and, when I put my 20 yard pin on a target I HIT IT, everytime!
First time on a stand, had a nice buck come in. Put the 20 yard pin on 'em, and let go. He ran about 40 yards and piled up, double lung and heart! NICE 9-pointer that I put on the wall.
Bottom line, be proficient and confident in whatever weapon you choose, practice as much as you can and keep the broadheads sharp!