Then there was the "Pedersen Device," which was a substitute bolt for the .30-'06 Springfield '03 which allowed small .30 caliber cartridges to be semiauto fired from forty round magazines.
The slightly modified rifle itself had an ejection port cut into the side of the receiver.
Chapter XV, pp 361-380, the Notebook.
While not full-auto, the intent of developing a whirlwind of semi-auto fire was very impressive to the test board, circa 1917 CE.
This was intended for the walking fire of an assault, but was considered to be inadequate, because the pistol-sized bullets did not have the menacing supersonic crack of the full .30-06 and the enemy would not keep their heads down.
I always thought that was stupid because if they didn't keep their heads down, they would afford better targets. Duh. Maybe I'm missing something on that.
Oh, well, that's what Hatcher said.
Terry, 230RN