My project is about finding the best barrel length for a set chamber. By best barrel i mean one that gets me the best distance at a set angle, the highest muzzle velocity, and maybe power(i like the box of truth thing jack mentioned)


I was planning on using a modified sprinkler valve(which i have ...

thanks iPaintball, i was begining to think everyone on this site was an arrogant douche bag.

I'm a 12th grader in physics and i've been making comubustion guns for about a year and i was thinking about doing a pneumatic cannon for a science project, but i don't really have a good knowledge of the actual science that goes into a cannon so i have a few questions.

1. How do i find a C:B ratio ...