A year and a half ago, I got back into .38 Spl. I had some Unique left over from my best friend, and found a good load of 158 gr. LSWC Rimrock bullets loaded on top of 4.2 gr. of Unique for about 820 fps. They don't lead at all, and shoot very good, and soft shooting. This load is a S&W Model 66 .357 Mag, so I load them a little long at 1.495" to accommodate the longer cylinders of .357, but you could seat them deeper for a Model 10 and not be in trouble.