RE: Is it necessary?
Shoot what you feel comfortable with.
Like was said above, I could comfortably pull a heck of a lot more but I choose to shoot close to if not 70 lbs. I can hold 70 lbs much more steady then I can 60. I'm doing what's right for me. You do what's right for you. That's why there is diversity in bow sales. Your doing the right thing for you. That's a good thing.