FireSupport FPS Chrono Chart (.2g to .45g BB's)

Please do not purchase this item, it is just a useful FPS guide.

Firesupport FPS Chart for different bb weights

When you test the fps of a gun using .20g bbs and get a result convert that to energy (joules)

if you then put a heavier bb in the gun and test the fps the resulting energy will be higher than when you tested using .20, this is joule creep

To avoid joule creep guns are upgraded and tested using the bb weight that the customer says they will be using.

When testing the gun at the site , the site should then test using the bbs you usually use and then use the attached chart to check the fps