small vanes are made for target shooting mainly..they work best with field tips so theyre addiquite for stability.i beleive your shooting will suffer with any kind of hunting head. todays bows are so fast that it might be a 4 inch vane would affect the way it shoots where a small vane would clear without hitting the rest.i shoot a 4 inch vane but then again i use a fall away rest,,and my bow isnt anywhere neer 350fps.