You have been asking and now we've got to it. A tube unloader similar to the one for the 45 ACP.
It will remove the smaller diameter rounds such as 9 MM, 38 Super, & 357 Magnum.
This unloader fits correctly so that you are not bending the moon clip.It is a long tube and all 8 unloaded 357 rounds will fit in it.
The tube outside diameter is 0.5625" and the wall is 0.050" thick
The tube length is 10.5 inches and 8 357 Magnum cases are 10.32" (8 * 1.29").
The tool will hold all 8 357 Magnum cases.