The tapering/barreling of shaft was a common practice on the antique arrows, especially the wood arrows.
 
By making the head and tail section of the shaft thinner, while keeping the mid section thicker, the arrow would fly with reduced oscillation. In practice, you may find your barreled arrows corrects to a straight flight more quickly, if you do not already have the technique to achieve it on any kind of arrows.

The barreled shape can also reduce the air friction, making the arrow preserving more speed before landing at the target.

Our barreled carbon shaft is re-introducing this traditional and effective design.

Shaft Length
90cm (35.5") or 80cm (31.5") , no cutting service due to its special design. 
 
Shaft Geometry 
300 spine shafts (recommended for 50lbs or less draw weight)
tail section 7.2mm OD, mid section 7.8mm OD, head section 7.5mm OD.
200 spine shafts (recommended for 60lbs or more draw weight)
tail section 7.5mm OD, mid section 8mm OD, head section 7.8mm OD.

Arrow Weight 
500 to 1600 grains