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Old July 10th, 2007, 01:51   #14
mcguyver
 
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Join Date: Aug 2005
Location: Northern Alberta
Who says the gun shoots 1 Joule? It's the BB that has 1 Joule of muzzle energy. The gun may be more or less efficient with differing BB weights, hence the changes in energy with different BB weights. That BB merely "accepted" 1 Joule of energy. The gun amy in fact be capable and producing more output potential energy than what the actual kinetic energy of the BB is. The hop-up will eat up some energy in friction, air loss around the BB will eat up some, air seal losses in the hop-up may change due to different weights as well.

There's alot that goes on inside an airsoft gun, lots of areas for losses.
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