When the 90 grain Hornady lead semi-wadcutter is used with 5.5 grains of Unique, velocity is 969 fps from my revolver's 4-inch barrel. There is no leading from these bullets even though velocity is fairly high. The revolver's bore is smooth and mirror-bright.

Dropping the charge weight of Unique to 5.0 grains brings the velocity down quite a bit to 822 fps in my revolver. It is still very accurate and easy on revolver and cases.