Maybe I don't get your drift but if you compare load data from say lyman 44th and the 50th there are some big changes. You can't learn too much from the lyman cast manual.anyway glad your a readerEnlightening in a historical context, yes. But the OP is being criticized for "taking short cuts" and thus being ignorant of information he would have known if he had read the manual completely. I just re-read the section on the history of Lyman manuals to make sure I wasn't talking out my bung hole, and I found nothing in there that would make someone a better or safer reloader.