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I have some odd factory loads, I want to find this powder... 9.0 grains in a 158 swc jacketed round, case head stamped S B 357 mag...powder is very dense, and silver in color, 9.0 grains was very little in volume in the case. WAS VERY HOT LOADS! I LIKED IT.. i want to know what powder this is to find some and load it.thanks