Felix,
Very nice work, and I wouldn't worry too much about the finished weight, by the time you have the new stock on it, it may be heavier than it is now. It sounds like you have worked up a great load for it and the accuracy proves that you did get it regulated properly. Do not add lead to it, that will just make it handle worse because it will be too heavy. If you are able to handle it O.K. now, and the recoil is not too bad, I would just finish it off as it is. Best of luck to you! Bob