Just worked up some loadings using 8.7, 9.0, 9.4, and 9.7 grains of Unique behind Berry's 210 grain plated bullets. My Redhawk seemed to like 9.4 and 9.7 best, so I'm going go go with 9.7. They should shoot around 1100 - 1150 fps per Alliant; I'll be chronographing them on a camping/shooting/fishing outing we have planned in mid April. These are very mild, pleasant shooting rounds.

For full-power loads, I use 265 grain Cast Performance LWFNGC in front of 21.2 grains of 'Lil Gun. This combination chronographed at 1330 fps from my 6-1/2" Blackhawk. I'll measure the speed out of my Redhawk in April, too. These are neither mild nor pleasant shooting rounds.