Quote:
Originally Posted by Greylocks
Simply put. A fast light BB will produce the same impact as a slow heavyer BB. But a gun that shoots a .20 gram BB at, say 380fps will probably shoot a .25 at around 360 or maybe even 340. The end result is (for our purpose) the same.
This is ballistics 101.
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I've made a pretty detailed post about this topic before, but to sum it up:
What you've said is true... at the muzzle.
At 100 feet, anyone can attest that a 0.25g BB will hit harder than a 0.20g BB. Why? Because it retains much more energy over the flight path.
The main issue, however, is when gas guns are involved, because their output is not linear. Heavier BBs shot out of a gas gun will output MORE energy than a lighter BB will. In some cases, a gas gun that shoots a 0.20g BB at 330fps can output a 0.25g BB ALSO at 330fps. This is where the danger lies, and why the debate is open on why games should be limited by JOULES, rather than by velocity.
At least when limited by Joules, the gun can be tested with whatever weight BB the gun will be fielded with, as long as the user is honest enough to state that intent and the resources are available to make the appropriate calculations/conversions.