I guess the accuracy concerns you express requires experimenting with different bullets, different powders, and different loading of powders. It will take time from weeks to months, depending on your schedule and money at your disposal. I have found loading my bullets one to .5 grn below maxium, yeild the best accuracy. Unique and WW 231 has been good in my .44 specials. I would try 2400 too. Hard cast lead .431 bullets were good for me as well as Sierra JHC. Good luck!

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JIM
NRA Pistol Instr