jerryv,
Since I'm clumsy and don't like to spill powder, I make my powder dippers with a little modification: I use a longer case (like a .45 LC) and cut it partially. With the left over brass, I form a funnel and then solder another case on as a handle. Similar to your method, I use a syringe to determine the new dippers's capacity in cc's and then stamp the number in the funnel section.