Howdy SJ,
Yes, I know a little about rail guns, but I was assuming that we were talking about a shotgun of about 7 pounds that we could carry into the field and shoot either lead or other soft non-tox shot.
I still cannot imagine packing enough energy in a 7# all-electric shotgun to propel a shot charge out to 50 yards with enough force to take down a pheasant.
Now, a rail gun mounted on a Jeep to go out in the pasture and slaughter hogs is an idea that could get my attention. In that instance, weight is not much of a consideration and there is plenty of power in the engine to charge a big battery and supercapacitor.
HHH