Originally Posted by 1982flh80
My question then is... Are the new load manuals and data nowadays somewhat watered down? YES Been using Hornady and Speer manuals dated from 1966 to 1973 using IMR powders with excellent results. Is this a bad idea? NO
*caveat: A careful handloader will have no problem, but some of the powder formulations have changed over the years so err on the side of caution.
Some of my most enjoyable range trips in the 1990's involved hot Elmer Keith loads (.45-70 in an 1895 Marlin) that were published in the 60's. w00t!