I do have a 444 Marlin case and I had some 410 shells. I am not positive on this, but I do not think the 410 will fit into the chamber. I think I tried it. Even if it did, there would not be enough room for crimp to open up into the chamber, it would open up at least partially into the rifling, even a 2 1/2" shell. Further, the rifling would spin the shot charge to the point of being useless past 10 feet.