I just about the start making melts and have decided on starting with a 50/50 mix of 4625 and 415. Why? Well, it seems like a good place to start. I have 464 but that has a lot of additives and a lower melt point than 415. Depending on the temp of the melters, this may or may not be a good thing. I also have 444 as well as 415 and 464 and see no reason why any of them wouldn't work but for now I'll start with the 415. Using 4627 or 4630, I think, will produce a too soft of a melt and may be difficult to get cleanly out of the mold. Melt points 4630, 4627 = 125 4625 = 145 415 = 120-125 444 = 120-125 464 = 115-120