I use one to weigh my target points. Even with the ones that are supposed to have tight tollerances, there is a 2 to 3 grain difference.

You will also be surprised at the difference in the weight of vanes. The 3" vanetecs have a range of 6.6 grains to 7.4 grains. QuickSpins were even worse. Even feathers have similar % variations, but because they are so light the actual weight variation is much less.

I've been told to make sure that the points all weigh exactly the same and to make up any variation in the back end of the arrow. The theory is that a lighter shaft has a weaker spine than a heavier shaft and the addedweight at the back will compensate for this. I haven't been able to prove this since I'm not quite that consistent, but is seems logical.

Anyone else do this?