Problem with older loading manuals is that some now commonly used powders didn't exist in 1944, and as our recent discussions in the BP forum reveal some powders especially black powders differ radically from what was available only a couple of decades ago.
Also Reloading data available from ammunition manufacturers is often optimistic.
I've found that carefully assembled loads tested in the field are the best strating points.
A Good .303 British load on paper may not be a good load for use in the average No1 or No4.
A good .32/20 load according to published data, might be a bad one for an older lever action or handgun.
Which reminds me, always remember that high velocity .32/20 loads are not reccomended for revolvers in that caliber, especially Black Powder era revolvers.