it is.
I have a couple of short tubes and have stood there loading them with my left hand while I operate the machine with my right hand.
I could have just as easily sat down and filed 7-8 empty tubes and been done with it.
I cut the short tubes so I could dial in the metal adaptor etc without a ton of weight on top.
one thing I do for the smaller 30-32 cal pistol type boolits is turn the metal drop tube around so it's full length is facing outwards and the little boolits just clear the base of the tube.