when i started bowfishing,my first arrows had plastic vanes and i was shooting off the shelf.i couldn't hit anything and my arrows flew erratic.then i bought some arrows that had no fletchings.the problem was solved.i didn't know much then and probably still don't now,but it seemed like the vanes off the shelf was the problem.i then read books that said that if you want to shoot plastic vanes,you sould shoot off an elevated rest.if you get good flight with them then i say go for it,steve
