After hearing you mention that earlier this year, I bought one as well...I still haven't used it...Hopefully I'll get around to it in a month or so...I guess after rolling a few with the Lee I need to verify that they still shoot as good as my other ones...
I've used a Rapine bag mold for both my .40 and .54 for over 20 years...I've never weighed my balls but I will say, with open sights I'll bet we can't detect a few ounces difference in weight...I have taken some ugly, wrinkled balls to the range and they shot just as well as bright, shiney ones...