Great, so I cut down to the hexagonal part. Dart is much more accurate, although it's losign distance, I'm assuming from drop in mass.
Search for "Converted Dart Tag Darts" or CDTD or CDTs. Or you can just trim the hollow dome off of the tip of the streamlines.
2-inch length Stefans will work fine in the Longshot provided you cut out the peg inside the bolt.
I can probably shove something in it to compensate for that though. Thanks.