I too use only Goex but that is mostly because that is what I have available.
Having said that I would also add that the Swiss powder should be expected to be at least as good, if not better, than Goex.
A few years back, I decided I simply had to try that Swiss powder...well, here we are a couple of years down the road, and I still don't have any...not that I have really needed powder, but mostly because every time I read a passage about that "Fine Sporting grade Power", Swiss powder seems to come to mind.
It seems to depend on who you are talking to regarding opinions on today's available powder versus powders of the 1800's.......Some folks, and I guess I am part of this crowd, believe that today's powders most likely exceed the quality of the powder available 200 years ago.
Others believe there was something almost magical about the powders of 200 years ago, and that the "Fine Sporting grade Powder" of the day was far superior to anything we have today.
I used to shoot a bit with old Doc Hastings, when I lived in Shelton, WA, and this man was quite likely one of the most knowledgeable people I have ever met when it comes to Powder and Muzzle loader performance.
His belief, which he often said was shared by the majority of shooters at Friendship, was that the then new Swiss powders would soon dominate the markets world wide, "because many people felt it performed much like the powders of years gone by".
So, there we go again, another statement to the effect that the older powder is often perceived as a better quality powder....and it is perception, not actual performance, that sells "stuff".
Well, that has been a few years back and although the times have changed quite a bit, It seems Goex is still holding their own.
All this ramblin is not an answer to Morgan's question, but it might serve to point out that there is no total agreement on what the best powder is....or even the best application of grain size to caliber, for that matter.
"Vermont Freedom" has performed some rather extensive comparison testing of Goex vs Swiss, and I'm sure he has developed a more profession opinion of both the pro's & cons.
There is a good probability he will come along here shortly and help us all out.
Uncle Russ...