FPS question

Discuss battery powered AEGs (Automatic Electric Guns) in this forum.

Postby Nec » Tue Feb 15, 2011 9:25 am

Private Mack D. wrote:So, let me get this straight, the heavier the bullet, the better the accuracy of the gun is, but the FPS becomes lower, and if you use lighter bullets you get less accuracy, but more FPS.

Is that how it is?
Your on the right track, but you forgot about joules.

Heavier BBs:
Increase accuracy - less affected by the elements such as wind.
Increase range - The increase of weight makes bbs retains its energy longer.
Same Joules - This is the most common misconceptions of airsoft bb weights, E (Joules) =½ x Mass (weight of bb) x V (speed in meters per second)^2. If you use .2g bbs and you shoot 400 FPS that means you are shooting at ~1.49 Joules. If you use .25g bbs in the same gun that is shooting 400 FPS the Joules will still be ~1.49 but the FPS will be 358.

I've witnessed too many times, that people use a
Heavier gram BBs to pass a required chronograph for a gun that is shooting hot.
Think of this, heavier BBs, lower FPS, same Joules and Joules is what hurts people!
There's a difference between a person who has a screwdriver and a person who knows what they are doing.
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