Hi steemit community, i want to share my experience this subject,about ballistic
BALLISTIC is the field about mechanics that deals with launching, flight,behavior and effects of projectile , especially about in BULLET or bombs. The art or science of accelerating projectile to achieve a desired performance. 
It was great experience because it is actuall firing. That moment it gives me motivation , to be a police someday .
Guys thanks for visiting :) thank you for the support :)