SuperK,
You can weight out soft solder (50/50) to the weight you need, and drop into your socket on the broadhead.
As this solder melts at a low temp, you can melt it right in the Bheads socket. If you add a little flux, it will adhere to the Bhead socket, too.
Just be careful not to heat your broadhead any hotter than necessary to melt the solder, or melt the solder in a an old spoon, and pour it into the socket. (Make sure that there is NO moisture in that socket!) And scrub the flux residue off of the finished Bhead, cause it is very corrosive.
Check to be sure that the arrows taper will still fully seat in the socket.
Hope this helps you out.