I bought a used ball on here from a person, who had said it was 15 lb. I received it, had it plugged and drilled, and it feels more like a 16 to me. Now I take this as a risk of buying something online, and have already invested the $$ to get it plugged and drilled, so I don't have anything against who I bought it from. My question is, is it better for me to just try and resell it, or just attempt to use it? I threw it today for the first time, and it will take some getting used to. For one, it is a particle ball, and for two, it is heavier. My revs are a lot less, definitely, but it seems to move okay to the pocket.