I sure do like that Single Six !!
I was looking thru my "library" and found an article of interest in the August 06 Handloader #242. It's .41 Magnum Lite, by M Venturino. Lots of loads for 41Mag cases at 600 to 1000fps with faster powders like BE and HP-38 in M57 and M58 Smiths. I suspect posting a scan is not "OK" but they have back issues, and I bet others may have it in the "library". If interested I can post some of the loads like :
410429 HP-38 5.0gr 654fps and 1.625 in group,
410429 HP-38 6.0gr 864fps and 1.625 in group .
All groups are 12 shots at 25yards from Ransom from 4 inch barrels.