Oh boy. No sir, 85, I do not. It's been a while ago is about the best I can answer. I have all issues from their last one back 19 or 20 years but I don't remember which one.

Daryl, I've never read of using anything other than faster burning powders for a duplex load. That doesn't mean anything other than I've never read or heard of it. Evidently it works well, if at a higher percentage of the load?

After getting off to a rough start in working up the load for my 11.15 X 60R I started chronographing every load. My experience with that rifle, and a later Reilly in 500 BPE, confirmed what Bell, Seyfried and others had frequently mentioned, with modern BP enough velocity to regulate could not be achieved. With the aforementioned Reilly I ended up duplexing it as well as having to paper patch bullets to accommodate the Henry rifling. That will be my last Henry rifled firearm, if my intended use is BP.

Oddly, a much later German, muzzleloading double rifle regulated with straight BP with the second load tried. That rifle was supposed to be a summer long project as I anticipated considerable difficulties in getting it to regulate. I got a bit of a smug feeling, thinking "I have this double rifle thing figured out." If I get another in my allotted time, I fully expect to be severely humbled.

Ah...I'm currently working with a drilling in 16 X 16 over 9.3 X 72R. IMR-3031 has given the best results so far. IIRC it is a 1924 proofed drilling. Jacketed bullets only in this one as the bore is slightly pitted.