Wayne,

Lyman 49th Edition certainly does say what you quoted. However, if you compare an original factory load with a 358429, I think you'll find the factory load has a shorter nose than the Lyman does.

It seems like I've read somewhere that Elmer and Phil Sharpe worked with S&W on the cartridge design and they settled on the 158 gr bullet Sharpe designed instead of Elmer's slightly heavier bullet. I know it was notorious for its leading, which doesn't sound like something Elmer would be in favor of.