All the military M1 carbines were originally chambered for the .30 caliber carbine round. This roundhasa slender straight rimless case that is1.25 inches long.It was developed from the .32 Winchester automatic round.The .32 Winchester automatic was a semi-rimmed rifle round fired in the Model 1905 Winchester rifle.The militaryball bullet for the .30 carbineweighed 110 grains. Velocity was in the area of 2000-2100 fps.

The .30 carbine is really not a suitable deer round unless used at short range by a good shooter. My Dad hunted with a .30 carbine that igave him for over 35 years. He killed a lot of deer with it, all at short range.

In the 60sor 70s; one Marvin Johnson, of Johnson automatic rifle fame, developed the .22 MMJ. This was the .30 caliber carbine round necked down to .22. Had one one once and it was neat.

Will take a photo as soon as i can find the camera. Will post it on this thread.