There is no factory or importer loading data for Swiss powders. There are three granulations I have tested, 3F, 2F and 1 1/2F. I think there may be a finer priming powder, too. Here is what I found. With a 100-grain measure that holds that exact weighed amount of Goex 2F, in my .58 flintlock Hawken I built, and a roundball, that gives 1630 fps. But that same measure (gently poured full, not shaken or tapped) holds 119.5 grains of Swiss 1 1/2, which averages 1660 fps. The weight of Swiss 1 1/2 to equal Goex 2F velocity, 1630 fps, is 112 grains. My Goex cost me $15 per pound at Fort Bridger Rendezvous last fall, 7000 grains per pound divided by 100 grains is 70 shots per pound at 21 cents per shot. I got the Swiss 1 1/2 at Upper Missouri River Trading Co. in Crofton, NE last June for $27 per pound. So this cost 43 cents per shot to equal Goex 2F velocity, or double. Yes, it is clean burning, but only until about 110 grains in my .58, and then it fouls badly. If I shoot 120 grains, I cannot get a ball down after 3 or 4 shots. So I do not use it for elk hunting loads. The Swiss powders are very good, but so is Goex. What caliber rifle will you use it in?
