The measurements and observations about maximum and minimum diameters agree with what I've measured as well. It may also be interesting to note that the wall is much thicker at the seam and gradually thins out towards the poles as well, so that the poles are thinnest and seam is thickest. But it's a gradual change, from what I've seen the seam is not just a bulge around the equator of the ball. (using Elixir)
sunshaker, on Jan 4 2009, 01:36 PM, said:
The water displacement trick wouldn't work here because the water would wreck the paintball (changing the volume), but you can do the fine powder displacement trick. Basically you get some fine sand, carefully measure a given volume of it, place one or more paintballs in a marked container and pour in the given volume of sand. Any difference between the two volumes is the volume of the paintball(s). The paintballs might be a bit dirty afterwards so you might not want to fire them...
What's wrong with putting the paintball in water? The volume of the paintball that went into the water is conserved, and as long as you weigh it before you put it in, who cares if it's unusable when it comes out. Water, olive oil, alcohol, any liquid will work to measure volume, just make sure the ball sinks.
<img src="http://img.photobucket.com/albums/v205/Leftystrikesback/Paintball/Sig4.jpg" border="0" class="linked-sig-image" />
<!--sizeo:1--><span style="font-size:8pt;line-height:100%"><!--/sizeo-->"do the math, save the world"<!--sizec--></span><!--/sizec-->