There are several br scientists who shoot at the same club I do. All are really bright, probably have forgotten more than I'll ever know about handloading and shooting. Most of them are helpful and modest. One or two have let it go to the head. That sort of hubris makes me wonder. I don't know. They seem a bit lopsided.
One thing I do know is there are more safe recipes than the manuals account for. If you've ever monkeyed around with wildcats or read about them, you know. There are many adventurous yet well reasoned guys out there. They still have both eyes and ten fingers. It may be a controversial thing to say, but manuals are written for a large variety of rifles and levels of intellect and therefore may be somewhat conservative. A well reasoned, cautious, alert approach to creative problem solving is realistic, in my view. This is why I axed the question. Somebody out there has to have the answer, if there is one.
Hodgdon says Trail Boss. Fill the case to the bottom of the loaded bullet and that's your max. Minimum is 30% less. Good for about 1600 fps, depending.
The Speer data mentioned above came up also. There's an old Speer manual on the shelf. Will check into this one.
Will check the Lyman manual, too.
Johan at Accurate says 35.0-50.0 gr of 5744 under a 225 will get 1975 to 2650. This would be perfect at about 2300.
Still gathering info...
Any of these will work velocity wise, well maybe not Trail Boss, 1600 falls into a pot of gold. Deer hunting where we live is a short range affair, so uber accuracy isn't necessary. Eager to turn it up to 11 tho, see how hard it kicks and how small I can get it to shoot. It's at the smith now having the Accubrake cut off. Judging by the exit scuff... well anyway, the rest of the rifle is sound and straight.