I couldn't find a proper reproduction cartridge box for the 41 where the cartridges fit without rattling around in the box, so I adapted a pair of my 44 Russian Cheyenne boxes. It was as easy as just lining the interior walls with pieces of cardboard, a pair of 4 1/2" X 1 7/16" and a pair of 2 1/4" X 1 7/16", then gluing them to the interior sides of the box. 50 41 Colt ctgs fit almost perfectly. I then played with resizing a picture of an old 41 label I found on the internet and printed them and glued them over the 44 Russian labels.