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How to stop the ammo falling out the end of the barrel?

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How to stop the ammo falling out the end of the barrel?

Unread postAuthor: shud_b_rite » Thu Feb 01, 2007 11:05 pm

I am currently building a pneumatic cannon, although it is not finished I have done some test fires. Everything works great, the sour grapes make a nice splat against the garden shed.

The only problem is that if I want to fire downwards, then I have very little time to aim and shoot before the ammo falls out the end of the barrel. How do I overcome this problem? I cant use magnets because that doesnt work on sour grapes and many other objects. My barrel is 20mm diameter. Any ideas?
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Unread postAuthor: noname » Thu Feb 01, 2007 11:06 pm

Ever heard of wadding?
Do some research before asking a question which can be answered in under 5 minutes of searching.
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Unread postAuthor: A-98 » Thu Feb 01, 2007 11:10 pm

harsh

if your using a breech then out some solvent at the very beginning of it so that th ammo get slighly stuck. this also works with a muzzle loader, you just have to push it past the glue

i know how you feel, and im too lazy to make wadding for every shot
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Unread postAuthor: Hotwired » Thu Feb 01, 2007 11:11 pm

Or stop firing undersize ammo.

Use potatos and you'll have a perfect fit and it stays there even pointing vertically down.
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Unread postAuthor: A-98 » Thu Feb 01, 2007 11:12 pm

i find potatoes relatively lame. to squishy and soft for any good penetration
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Unread postAuthor: Canuckicks » Thu Feb 01, 2007 11:17 pm

Like the others before, just use tighter fitting projectiles, or prehaps reverse a sabot (but that would end with the destructuon of said sabot most likely :cry: )
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Unread postAuthor: Hotwired » Thu Feb 01, 2007 11:20 pm

A-98 wrote:i find potatoes relatively lame. to squishy and soft for any good penetration


Hes firing grapes. How much less penetrating could even a soft potato be?
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Unread postAuthor: shud_b_rite » Thu Feb 01, 2007 11:26 pm

Actually I havnt heard of wadding. This is my first gun that I have made and I am not very experienced. But yes that should work, thanks for the suggestion.

I also dont like potatoes for ammo because my gun is too small to fire a whole potato so I have to mush it into the pipe which ends up getting messy and also because it is not heavy enough.
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Unread postAuthor: squeaks » Thu Feb 01, 2007 11:27 pm

just use a tissue or toilet paper as wadding.
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Unread postAuthor: Hotwired » Thu Feb 01, 2007 11:32 pm

In that case you'd be amazed how many people don't actually fire whole potatos.

The idea is to fire a potato slug cut by the barrel or a barrel sized cutter.

If you think your barrel is too small for potatos at 20mm my cannon has a 15mm copper barrel and it fires them like nobodys business.

Mind you copper is a lot better than most pipe for cutting into spuds.
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