Xcutters my eye! They shoulda named them exactly what they are. Fat-shaftin' Linecutters. But that's the deal. Get the fattest shafts that will spine out for your bow, and still be legal for the league.Some havelimits on the maximum arrow shaft diameter.I'd go with aluminum, myself, for better consistency. You don't have to worry about weight or trajectory when popping paper at 20 yards indoorseither, and aluminums are so much easier to pull out of the target.