I am trying to find a moderate load for my Smith & Wesson M66 4 inch using the .357 case. I have 158 gr. SWC 20-1 sized .358 with a brinnel of 8 to 9. Powders available are Unique, Win 231 and Universal Clays. Of course my goal would be to get at least .38+p velocities maybe 900 to 1000 fps and not lead the cylinder and barrel. The Hodgon manual quotes 5 grains Unique as max for the 158 lead bullet. Web searches show 6 to 7 grs. and hard cast. Is it possible to get the velocity I want with these softer slugs?
harbor2