This makes sense, given that there's an upper limit as to how far back you can pull the bowstring on a given bow (and thus after a point, higher Strength makes no difference), whereas if you're not strong enough to pull the bowstring all the way back, you're not going to send the arrow flying as fast, and thus your damage potential decreases.If you have a penalty for low Strength, apply it to damage rolls when you use a longbow. If you have a bonus for high Strength, you can apply it to damage rolls when you use a composite longbow (see below) but not a regular longbow.