Looking around widely, it seems to me that currently manufactured powders of interest might include:
- SwissReload RS 14 (appears to have been made specifically to replace black powder)
- Vihtavuori N32C Tin Star (apparently this one is somewhat similar to Unique, though denser)
- Some of the NobelSport Vectan powders (the basis of most reloading in the French Gheerbrant reloading manual)
I base this on reloading recipes that I find in Gheerbrant and European reloading sources, where these feature quite often for antiques.
Western Metals at one point had some of the Vectan powders. I note that many are listed in the "authorized explosives" list (or whatever it's called) at NRC, so to an extent, the legwork to make it easier to import them has already been done. I haven't figured out if that's the case with N32C Tin Star, but other VV powders are definitely listed. SwissReload products aren't.
I've thought of bother Western Metals about getting more Vectan products in, and the VV distributors about stocking N32C Tin Star. Has anyone else done this? Can anyone think of a place that might be willing to take on bringing in SwissReload?