Try MBC 357 hardcast with Herco, 800x, Pow Pist
I tried to get good accuracy with tight group and It just was not there in 3 of my revolvers. In 357 mag (lite) I use Missouri Bullet Company's 158g SWC extra hard cast bullet and worked up from the starting load with Herco, 800x, and power pistol all gave great accuracy. Power pistol was the best at 1.5 grains under max using standard small pistol primers & medium crimp. Very comfortable, no leading, and great accuracy at a fraction the price of jacketed. Best of luck.
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