we always figured that from 750 fps maybe 800fps loadings, none were needed, at 1250fps, ya need em...... buy good quality molds they'll last you forever....... & don't forget to get a .358 sizer & the correct top punch for it....... We use a very old RCBS sizer luber without a heater & if using hi temp lube, we bathe the body of the sizer with a small propane torch for 15-20 seconds to keep the lube flowing smoothly, some guys use a 100 watt lightbulb laid along the base of the sizer.
When you cast, stay in a well ventilated area, with NO, repeat NO water near your lead pot, a coupla drops of water, or iced tea/pop dropped into the molten lead will cause it to splash/spatter in your face, causing serious burns. After casting/sizing, wash your hands & face thouroughly before eating/drinking,smoking & you should be okay on keeping your blood lead level (BLL) in the safe range.
Do NOT let small children handle lead bullets, ingots or wastage/splatter or flux residue, lead affects them & pregnant women harder than it does healthy adult men.....
be safe, enjoy life, journey well
OFC, Mo. Chapter