The hard part is likely to be the barrel. Green Mountain only has a few .41 pistol blanks left on closeout, and I can't find *any* .41 barrels from any of the usual sources! . Seems the .41 mag turned into another orphan caliber, taking possibilities of the .41 special with it.
One can find .400 ( .38-40 ) and .429 ( .44 spcl/mag ) but no .410 ....
It really doesn't help that the .41 , being .410 in diameter, is only barely larger than the .38-40 and only barely smaller than the .44's .
betwixt and between, thus forgotten by most everyone.
yhs
prof marvel