Been playing with several load variations in my Ruger Blackhawk flat top .44 special. Have yet to find any combo that gives me a decent 20 yard group. Tried Unique, 231, Red Dot, AA#7 and AA#9. Cylinder throat mic's at .4296, and I have used .430 boolits of 200, 235, 240, 252, and 258 gr. There is slight blackening of cases with most powders, with Unique being nasty.
Any suggestions?