Mec, Great info! Good shooten too. Now I have a question for you. From the first time I ever touched a muzzle loader (I was about 12) I have used nothing but Goex. It works so I just never changed and found that I could always work up a good load with it no matter what I was sighting in, rifle, shotgun, musket, pistol and revolver. Never tried any of the "imposter powders" but that is mainly due to the price and I'm really a cheap skate!
At the same time I keep hearing and reading good things about the old Swiss black powder and the velosity and accuracy alway's seems to be really high with Swiss.In fact it always seems real close to H777. Have you found that to be true in your test over the years and is Swiss worth giving a try in say a 1861 .36 or the Remington .44? I have read some of the data given for the Swiss in your book also.