John Taffin on "5 gr. Unique" and the 38 spl...
https://americanhandgunner.com/uniqu...-a-perfect-10/
"Five grains Unique has been a standard load for the .38 Special with both the Military and Police .38 and Unique powder arriving right about the same time. With the Lyman #358477 SWC hard cast bullet in a pre-War S&W 4″ M&P muzzle velocity is right at 950 fps with groups just over 1″. The same load works the same wonders in the .357 also."
The Lyman #358477 is a 150 gr SWC