Stepping up the BHN with range lead that has about 4% antimony using about 3 oz of 30% antimony 70% lead ingot to 16 oz lead, Added a little tin. Bullets fill mold perfect with consistent weight 178.6 to 178.8 gr and all with 31.4 BHN with the Lee hardness tester after heat treated in oven and quenched. The numbers give me 2250 to 2400 fps, just right for my hunting most 100 yards or less for deer. Boolits .312 or .313 of not sized, good match with groove .313. Also will back down about 2500 from the max pressure, bullets gas checked. 7.62x54 M44.
Maybe BHN to hard will not expand?, make a few hollow points? This is uncharted FPS for my cast boolits, would like to hear from someone who has been there