My very first piston cannon :)

[hyldgaard]

Novacastrian:
Damn, i was hoping for something like maybe 80 feet what does your darts weigh? mine is about 2,5 grams each.

any of you guys tried blowgun darts at higher pressures? i tried to search but only found a lot of topics regarding blowguns as triggers and crap homemade darts
could be interesting to mount a 2m 12mm (10mm ID) barrel and shoot some 0.40 cal blowgun darts 8)

[Novacastrian]

My measurements are from a combustion, your's will possibly exceed this (i'm damn sure it will). Sorry i should have thought to mention that before
http://www.spudfiles.com/forums/pimpin-ammo-t9989.html
This is my small contribution to ammo science

[hyldgaard]

Well, as long as i only fire it at 90 psi the difference isnt THAT big i guess.
small contribution? those slugs are some of the nicest ammo for spudguns i have seen so far, very nice job im gonna try making some of those with epoxy, just to try it out

[Novacastrian]

If you read all the pages you will find that i have already made epoxy ammo
They work good.. Thanks for the comments too!

[st.croixsurfer]

i want to make one of those soooooooo bad i was going to make one today out of copper and i was rushed in home depot that place is a mess
so i just made a ghetto ballvalve sniper its prety good but nowhere near as good as yours that is a work of art

[Zen///]

:O "The moneyshot"

Lol through the penny.

[hyldgaard]

st.croixsurfer: You really should try building a piston valve, if you can get your hands on the parts needed, its hardly a challenge to build one. and even if you cant get the required parts, the machining is really worth the effort
And if you think the guns looks nice now, i can only advice you to follow this thread in the future, as i have some upgrades planned. The plans involve bolt action breech loading, multiple shots (not semiauto), a better looking chamber that can take some more pressure, and probably a stock too.

[st.croixsurfer]

i definantly will

[Acdcmonkey1991]

Nice, I love the sleek look. You might want to look into getting something else for your chamber though, depending on what pressure you plan on taking this to.

[hyldgaard]

yea.. you might wanna look into the text abit before posting
I have allready said a couple of times that it is only a matter of time before the chamber will be changed, the pop bottle was a temporary solution so i was able to test the rest of the cannon.