I have. As much as 6 inches difference in drop at 100 yards in a .54 Hawken with the same charge. When the weather clears and I can get to the range I will attempt to document this difference. I'll use Goex in the fowler. But in rifles the Swiss shoots much flatter for me.
Tried OE a while back. In my fast twist (1-30) 45 caliber set up for paper patch conicals it was 8” or so lower at 300 yards with a bigger group that I get with Swiss. Although with only a few dozen shots or so it was wasn’t exactly a detailed evaluation, but the half pound of OE was free, so I tried it. If I recall correctly, had to go from 80 grains of Swiss to over 90 grains of OE to get close to the same point of impact, but lager group made it challenging to be sure. Didn’t try any of the OE with roundballs, but with about 15 pounds of Swiss fff from last PowderInc order I not in any hurry to mess with something that’s working.
I shoot 3F in 50 cal and FF in .54.
After a year of struggling with Goex 2F and 3F trying to reproduce the accuracy I once enjoyed using Goex Cartridge grade in a .45 lever gun, I finally discovered that Swiss 1 1/2 F provides comparable results.
My confusion seems to be in the granulation of swiss vrs goex.
The grain size looks the same to me. Goex has a dull surface and Swiss is more polished looking.
I have only tried the OE fff, and only shot about a 1/2 pound of it total. Can only speak to what I observed, and can best summarize by stating that the OE fff was not, at least in my rifle, a straight grain for grain (by volume) substitute for Swiss fff, a proven and accurate load in my gun from 80 to 90 grains with the 400 grain bullet I use. The OE as I remember did have a much larger velocity standard deviation on the few shots I put over a chronograph (no, I do not have the data). Would imagine that with some load development it should be able to be made to work, but is something I was not interested in doing then or now.
