Where does this propellant fall on burning rate chart compared to powders available in America, i.e., Alliant's Reloader series, IMR, Hogdon, Ramshot, VV, etc?
I was intrigued after checking out the GS Custom bullet site referenced on an earlier thread. I mainly shoot a 6.5 Swede and lo and behold, on the Q&A section of their site, a user reported test data using the 110g HPV projectile from a sporterized Swede using S 341 powder.
It is an interesting concept, sort of like Barnes X bullet although with a couple of additional bells and whistles. I'm trying to sort through some of their recommendations however. GS Custom recommends using a powder that fills up the case (pretty much conventional wisdom), yet in the same breath they acknowledge faster powders than what is considered normal for a conventional lead/jacketed slug are more appropriate. I realize copper has a lower specific gravity than lead so a lighter copper slug might still fill up a case equivalent to a heavier lead slug, but I've got to believe that there is some seriously unoccupied space in those Swede cases when loading S 341. Anyway, the user reported 8mm (.33") groups at 100 meters so it must work.
If you haven't checked out their site, I recommend you do so. Even if you never place an order with them, their approach is really something to think about and they've got plenty of testimonials supporting their products. I checked prices on against an exchange rate site and for 6.5mm, they worked out to around $33.00/50 delivered to the US.