None of this is true, there is plenty of data on .40 major. Plenty of shooters on this site use WST which to make major requires them to dabble in the "over max load" area when using heavier bullets but most are experienced reloaders that increase oal to allow for increases in pressure. I have a shelf full of powders that are used in .40 s&w including; Titegroup, Win231, Win WSF, Win WST, Longshot, Clays and others.