Just found a half box of the Speer 38sp 146 JHP, but don't have a old Speer manual. The bullet is discontinued and isn't listed in anything that I have. I'd like to use either Unique or Bullseye, and makes no difference if it's 38sp or 357. I read somewhere that there was a minimum velocity with these bullets to prevent core separation. I just want a mid-range recipe. Thank you as always.