2 of 7
Prepare Your Supplies

© 2008 David Muhlestein licensed to About.com, Inc.
Make sure you have an accurate chronograph (either hand-held or one that sits on a base) and also make sure you have the proper tools to adjust your gun. Some guns require Allen wrenches (hex keys) to adjust velocity while others can be adjusted by hand. Familiarize yourself with the proper way to adjust your gun's pressure whether it be simply adding tension on a rear screw or adjusting the regulator's pressure.
2 of 7