Join the #1 community for gun owners of the Northwest
We believe the 2nd Amendment is best defended through grass-roots organization, education, and advocacy centered around individual gun owners. It is our mission to encourage, organize, and support these efforts throughout Oregon, Washington, Idaho, Montana, and Wyoming.
Those shots are my mortar (built by Bill McKenna) and DDB's photography.
My sub chamber holds just about 4 oz of Fg or FFg but keep in mind that mine is a conventional mortar and not a gas cylinder. I've got a sub chamber in the breech plug (95 lbs of steel) and 1 1/4 wall thickness on the tube. In my mortar 4 oz of fg gives me about 400 yards at a very high angle. I once tried cannon grade powder and got about 50 ft range. With a sub chamber the diameter of the chamber counts as the bore of the gun for powder charge purposes, in my case about 3 in..
The high res picture links are here...
<broken link removed>
I use two 1 qt ziplocks full of gas on top of the ball for those fireballs and the fireball has never touched the ground. All that hits the ground is the zip part of the bag which may start a grass fire but that's all.
The best use I ever saw for cans of Old Milwaukee Light was as projectiles from a mortar that used lighter fluid for fuel. They flew hundreds of yards!
I built something like this about 15 years ago out of scrap steel plate and 4 1/2" pipe. I had a stand for it with an adjustment bolt to set degree. those rubber balls you find at batting cages worked great in it. It didn't go BOOM when you touched it off but more of a thump. Got to wondering if it was legal to have so I dumped it before I got busted with it. I still kinda miss it
If our Supporting Vendors don't have what you're looking for, use these links before making a purchase and we will receive a small percentage of the sale