Technical information

Practical A.E.G Upgrade 2006

What is the most accurate way to measure FPS?

Frankly, there is no single best way to measure FPS. It is believed by many that

the more accurate yet cheap way to measure FPS is through the use of a

chronograph. The problem with this method is that rarely will the chronographed

speed correlate to the actual bullet velocities of your setup. Without proper

calibration, no two chronographs will clock the same velocity.

Oehler Research offers a really fancy (and expensive) Chronograph known as

the Model 35 Proof Chronograph. It has a built-in printer included. Visit

http://www.oehler-research.com/ for more information.

We also want to remind you that there are several ways to “cheat” the velocity

testing mechanism:

 use heavy BBs such as 0.30g or 0.40g

 use a weak battery (with a weak battery, your AEG will deliver less FPS even

on single shot)

 adjust the hopup to the fullest possible extent (increased back spinning can

lead to poorer velocity)

As said before, always REQUIRE all participating guns to use BBs of the same

class (eg. 0.2g) and have hopup completely released. If possible, use a battery

supplied by yourself to do the tests.