Daryl,

Do you do a "equilivancy" reduction in black powder. Rereading Wright, I read he recommends a 3 to 1 reduction in BP for a fast burning powder like SR4759. I had also read that elsewhere (though don't remember where).

BTW, I believe that SR4759 has a similar by=urn rate as H110. Is that correct?

However, I note Wright's load for 500 BPE is 15 gr SR4759 & 110 gr 2F which seems like the equilivant load of 155 gr of 2F.

Your comment on 3031 makes sense. I just have never read about using a medium speed smokeless in a duplex load.

Daryl & sharps4590, thanks for the info.