In my younger days, I used to shoot upwards of 100 pounds. One of my favorite longbows was 120. It'd make a 700 grain whistle.

The bow I shot tournaments with, field archery and 2D (which became 3D) was 80 pounds. But now that what hair I've got left is going gray, my shoulders are letting me know how stupid I was. If I had it all to do over again, I'd have never touched a bow that drew over 65 lbs.
I'd recommend you young guys stick with nothing more than 70, preferably less, and get yourself a T-shirt that says "My other bow is a hundred pounder" so you can thump your chest and strut.

Your shoulders will thank you for it when you get to be an old fart.