In my opinion there are no other molds which can match performance of my molds, nor can other designs match mine. I have thousands of customers who have the same opinion, and if I didn't have those custmers I wouldn't have this opinion!
However I don't believe design alone is your problem in this case, because your discription of the problem indicates the leading is occuring only with light loads, which is a common problem when bullet diameter is less than groove diameter. As power level gets high enough to obturate the bullet bases, the gas blowby is sealed off and the leading problem stops. If this is your problem, sizing to a little over groove diameter should fix the problem. Also, seating to lightly contact the throat may help or completely fix the problem, as contact with the throat, if bullets are at groove diameter, forms a gas seal.
