I've loaded cast bullets only for several .380s. Bullets have ranged in weight from a 93 grain RCBS round nose to a Lyman 104 grain flat nose to a SAECO 122 grain flat nose, all cast from wheelweight alloy and sized to .356". Powders included 231, Unique, Blue Dot, Herco, and Bullseye. Best (most accurate) loads with all bullet weights used 231 powder.