This document is straight to the point on the topic of reloading instructions for 40mm nylon cases.

Learn How to reload 40mm nylon cases to propel a 5–5½ ounce projectile from 160 to 200 yards.

To reload 40mm nylon case one should firstly punch out the brass propellant case from the nylon case using a long 1/4 in punch and hammer.

Complete instructions on reloading 40mm nylon cases are  provided in this guidebook.