It's interesting to know those Liberators shoot a foot high at 20 feet. I wonder how many resistance fighters missed a close head shot? With the 230-grain ball, it would group even higher wouldn't it?
That is about 40 times (or more) its intended range.
This was a 'put it against the guy and pull the trigger' type weapon.
If you need another shot, pick up HIS gun and use it.
Shooting at contact distance will also help muffle the sound of the shot.