Not sure if this will be useful for anyone, but I made a pretty cool joule chart. : r/airsoft
Airsoft FPS Chart: Safety Guide - NOVRITSCH Blog
Airsoft Calculator - Apps on Google Play
Ballahack Airsoft - Know the limits and capabilities of your gun! Your FPS may be low, but with a high weight round, it can still carry a heck of a lot of
Download Airsoft FPS Calculator Ad-Free APK 1.11 by Black Cable Development - Free Tools Android Apps