Thanks Mikey,
I had seen the loads for the 150 grain Round nose, and lacking any new information, that was going to be my starting point. On the Lyman website, it says that the 356637 was developed for IPSC, so I was hoping that maybe some IPSC or IDPA shooters had developed some IPSC Major Loads or some IDPA loads meeting the 125000 power factor with this bullet. It looks like I'll have to get out my Ransom Rest and Crony and go to work.