vintage ammo: not for carbines?

[spripple33]

Originally Posted by sheepherder

Perhaps this ammunition is not powerful enough to cycle the action AND push the bullet fully out of the carbine barrel...

I hadn't considered that. I wouldn't think cycling the action of a carbine vs. a pistol would "take up" enough energy to lodge the bullet in the barrel. If this ammo can make it through a standard 4 3/4 inch barrel but not a 12 inch barrel, it must not be very powerful...