Be sure to have brought a full can of propellant along with alot of ammo because trust me, these things get addictive, heh heh heh.
Before you go using this PCM, you should rig it to some sort of a stand. I would hope that you wouldn't hold this thing (it's designed to act like a mortar) because it really is powerful. Tie it into a small wagon or wheelbarrow (it saves building something) or if you are creative make it an adjustable "seat" or platform. Remember, build like a mortar, it WILL fire quite a large projectile in a direction in sort of a lob. Not meant to be fired perpendicular or so to the ground. Thank you!! have fun.
1) Screw off the end-plug, then grab some ammo.
2) Slice it on the end of the barrel, because that way it's a perfect seal.
3) Use your ramrod to push it all the way down the barrel to your pre-determined point.
4) Turn the cannon around and "mist" a HUGE amount of propellant into the combustion chamber. With this monster you can never have enough propellant.
*If it don't work, click the button a few more times. If it still don't work spray more propellant into the combustion chamber and try it again. Hopefully this doesn't blow your arm off...heheheh