Thenewest reloading manual that I have is dated 1973. Personally I do not put much stock in the concept of accuracy when the "most accurate" load is one that is shot from a machine rest or from a pressure gun.

Over the past few yearsI have tried a few of the so called "most accurate" loads and none worked out for me in my guns. Most of my favorite loads were worked up decades ago without the benefit of suggestions from reloading manuals. All of those loads are very accurate when fired from my guns.Those loads are now in a database. Some of the calibers I no longer have guns for.