For deer hunting round development I've used Lil'Gun, AA9 and 2400 to get velocities over 1200fps with 250gr and 265gr cast boolits, over 1400fps with 210-220's in jacketed. With 170gr Sierras it's been 800x but I've also found a good loading with the 250gr CP GC and 800x for close to 1200fps. The more I look around, I see 250gr .45 LC at around 1000fps is plenty so why not lower my 250's to that? I've gotten Titegroup to group using 6.5gr, and want to drop my 800x loadings to see if it'll still work with the 250's at lower speed.
Is 800x suitable for lower velocity in the .41, even down to 900fps or so? I haven't found "reduced" load data for that powder although it is listed for lower pressure .44 Special and .45 Colt. I don't think it's anything like 296 and H110 in needing high speed to work, but haven't seen proof.