Thanx for resurrecting this old thread! Great information!
I load my lead bullets ("J" woid, cast or swaged) to ~ 900-1,000 fps....357 brass, standard primers, "reasonable" powders; Unique, Universal; Wanting to try Herco, AA#5 or HS-6. That level of fps does all I will likely need it to, is pleasant to shoot and leading is less of a problem! I had no idea that the Speer or Hornady swaged projectiles were that soft!