"Hitler's buzz saw"....
shooting Russians in '42
Still shooting Russians in '22.....
Speaks to both a successful design and desperate people...
I've heard stories about our attempt to build the MG42 in .30-06, and how it failed due to our lack of taking into account the difference in length between the rounds....(don't have any solid sources, though, just stories over the years)
One of the stories says it was Savage, and it was only a prototype, and it didn't work due to the difference in cartridge length, which Savage engineers knew about. According to that version of the story, the Army gave them a captured MG42 and said "Build this! in 06! and build it yesterday!" and didn't care for explantions or the delay it would take to reverse engineer the gun to create the drawnings and tooling to make the gun in .30-06 and make it work. SO, Savage did what the customer demanded.
And when it didn't work, the idea was dropped by the Army for several good reasons, among them being, its a poor idea to arm your troops with an exact copy of the enemy's weapons (which look and sound just like the enemy), and that by the time any could be made and fielded, we didn't need them, the Brownings were winning the war just fine as they were...
There are other versions of the story, some similar, some different....no one today knows what really happened, or exactly why...