26 gram darts I was asked this question recently. What weight of darts do the Pros use and why do many use lighter darts? OK, I shall now make you sorry you asked, there will be a quiz at the end. I shall now open myself up for abuse and contrary opinions as that is not what works for you. That is fine, you have the right to be wrong! The theory is that heavier darts are easier to throw (less effort) but not as accurate (generality); lighter darts are easier to throw accurately and harder.