There is more to this than just the draw weight itself. Bobco tended to touch on it with his post. A 70 lb draw weight round wheel bow is not the same thing as a 70 lb draw weight perimeter weighted single cam bow or hatchet cam bow. The archer is forced to hold set peak draw weight for a longer percentage of the time on some of the more radically designed bows. This has to be considered in addition to the actual set draw weight of the bow.

Case in point, several of the bows I have been shooting in recent years have required me to turn the draw weight down from 70 to 65 lbs in order for me to feel comfortable while using them in a hunting situatioin. My last two bows have had a slightly more rounded draw cycle which allows me to again pull 70 lbs.

However, I set up a PSE Nova with Synergy " soft cams" the other day and decided to put a few arrows through it. The bottom limb had a listed peak weight of 70 lbs but the limbs were not bottomed out. But, when I drew it back I knew the draw weight was definitely over 70 lbs. Up on the scale it went.....84 lbs! My point is that though I did feel that it was over 70 lbs I did not have as much trouble as I thought I would pulling a bow of that weight back. The draw cycle definitely had a big part to play in it.