Who Me?
I have the Pet Loads books and Waters does not use 760 in his load development. There is an update in one of the Handloader Magazines, but I can’t seem to find it. I will look later.
I think Win 760 is a bit slow, although it certainly could be used with the 139-140’s. Are you sure you don’t mean 748? Win 760 is in the H-414 burn range and maybe near the 4350’s. I have used the 4350’s for some of my Waters loads, but I always had better luck with the mid-range powders…H-335, WC-844, 2015BR, or 748. If you have any of those powders, data is readily available. The Waters may be my favorite Super 14” barrel. Regardless, good-luck…BCB