what monster of an air rifle is that being shot out of?
Who said anything about air? 
A blunderbuss then?
That thing is just begging to have a shaped charge inside it for extra kaboom fun at the range.
A failed test to see if I could quick and dirty a chalk round
Way too slow due to weight and poor compression
Chalk didn’t really poof like I wanted
I’m hoping more speed with throw the chalk into the air better
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Yeaaaaa, I’m not licensed to have that much fun
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So not knocking what you have there. I have no firearm myself, only an air rifle that is kept at my inlaws cabin.
But ever shoot it out of a potato cannon?
It’s sort of a potato cannon,
Depends how you define it
I could shoot potatoes out of it, just uses gun powder instead of air or combustible gases
2.62 inch bore
I could easily scale my Ammo to match a pvc cannon
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A friend of mine once made a steam-powered spud gun out a steel pipe and an industrial valve. That thing could do a lot of damage.It was a sight to behold.
I made a pneumatic spud weapon some years ago. There’s plans on the google if you will. Basically it’s not explosive in nature and seems to be much more powerful. The design had a barrel that went all the way through to the back end, and used a diagaphram to seal it. Only down side is once you start charging it up, you are committed to firing it.
I used to fold up red shop rags and wrap a little electrical tape around them. Like a badminton thingy. I could, and did, make a cast iron tractor axle housing (model A John Deere) ring like a bell when I hit it. With. A. Rag.
I also tried loading it with paintballs like the grapeshot of the Napoleonic era. I used two styrofoam cups bottoms to contain it prior to firing. The effect was less grapeshot and more “cone of paint”.
ah, good times.
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Tannerite?
Legal in the U.S.
If you’re not an ass about it anyways.
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That’s why I like gun powder for my application
Also, I can fire 3-4 shots a minute if I were so inclined m
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Death! 
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We never really die…
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That’s true too
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