Standard Deviation by Arrow Type
OK, so I guess that I was a bit harsh about the first S.D. chart. This one, tells a much better story as to what arrows and bolts have a more or less accurate weight to them.
It's pretty simple, your more expensive arrows are more accurate.
Take SportsWeave VS AeroBolts.
The AeroBolts are made with Firenock's premium AeroWeave shafts. They have a Zero standard deviation. When you look at their SportsWeave shafts, while they're really good, coming in at around .025 standard deviation, they are an inexpensive shaft in comparison.
it's the same for all of the manufacturers. the more you pay, the better the shafts (within reason).