Frank,
Everybody kind of got sidetracked on twist rate. Here are my choices for powder with the 40 grain bullets. In order of preference.
#1 H4895
#2 IMR8208
#3 RL15 kind of slow vel but accurate.
Tried H335 and Tac but for some reason they didn't work as well for me.
I am sure there are several other powders that will work just as well but I haven't tried them.
