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I still haven't learnt...

A place to ask general spud cannon related questions.
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Unread postAuthor: jackssmirkingrevenge » Wed Sep 16, 2009 7:07 am

MrCrowley wrote:Sorry, I didn't mean that the tail and bullet would stay intact, I meant I can keep making the tails easily :P


Ah, but you said "I need something I can keep reusing" ;)

Anyways, it should work assuming the tape survives the heat.

Yeah you probably did suggest that earlier on, then again you've suggested half the sh|t I have done when it has come to spudguns :D


Hey, that's what forums are for :D
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Unread postAuthor: jeepkahn » Wed Sep 16, 2009 9:16 am

You can use jell-o gelatin, but follow the directions for ballistic gel...It's the same stuff, just differant recipes for differant uses... And then you can eat the damage.... It'll just be chewier than normally made jello...
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Unread postAuthor: Ragnarok » Wed Sep 16, 2009 9:42 am

I told you you really needed MOAR BAKKSTOP! :tongue3:
... does anyone around here still listen to me?

Anyway, impressive. Now less of the Dyi-stops... I was sure you would have learned after that debacle with the vacuum cleaner. :roll:
(Odd, the Firefox UK dictionary doesn't recognise debacle as a word...)
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Unread postAuthor: jackssmirkingrevenge » Wed Sep 16, 2009 10:00 am

Ragnarok wrote:Dyi-stops


I LOLed :D
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Unread postAuthor: Ragnarok » Wed Sep 16, 2009 10:47 am

I probably should be careful about being too... overzealous about this point. I'll probably end up doing it one day - probably when I start genuinely messing with armour piercing projectiles - and then I'll look like a right hypotwit.
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Unread postAuthor: jeepkahn » Wed Sep 16, 2009 11:09 am

Sands-o-truth..... Prolly the MOST effective backstop available to the general public... Even AP rounds stop quickly in the heavy viscous stuff...

http://www.theboxotruth.com/docs/bot7.htm
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Unread postAuthor: MrCrowley » Wed Sep 16, 2009 2:48 pm

Ragnarok wrote:I told you you really needed MOAR BAKKSTOP! :tongue3:
... does anyone around here still listen to me?

Anyway, impressive. Now less of the Dyi-stops... I was sure you would have learned after that debacle with the vacuum cleaner. :roll:
(Odd, the Firefox UK dictionary doesn't recognise debacle as a word...)

I don't exactly have a much better track record than dyi now do I? :oops:

@jeepkahn,
Do you think wet sand would make a big difference? Sure I live few hundred meters from the beach, but I'd rather bring back a bag full of sand compared to two bag fulls if making it wet makes it more effective.
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Unread postAuthor: POLAND_SPUD » Wed Sep 16, 2009 3:10 pm

wet sand works better... it's mentioned in one of US army field manuals... I don't remember which one... something along the lines of 'basic soldier skills' or something like that and there is a chapter about fighting positions
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Last edited by POLAND_SPUD on Wed Sep 16, 2009 3:44 pm, edited 1 time in total.
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Unread postAuthor: jeepkahn » Wed Sep 16, 2009 3:14 pm

Not Sure, but I would imagine it would make it more effective...but even dry, hi powered rifle rounds barely made it through 6", so if you could do a 10" thick box, I would reckon that it'll stop anything you throw at it...
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Unread postAuthor: MrCrowley » Wed Sep 16, 2009 3:35 pm

I just need to think of something to hold the sand in. It can't be permanent (if it was a wooden box, once a round goes through the box, you can't use it again), and plastic bags might make a bit of a mess. But it seems like the only option...

edit: milk bottles...got plenty of them, disposable, shouldn't make too much of a mess using wet sand...
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Unread postAuthor: Ragnarok » Wed Sep 16, 2009 3:56 pm

jeepkahn wrote:...but even dry, hi powered rifle rounds barely made it through 6", so if you could do a 10" thick box, I would reckon that it'll stop anything you throw at it...

Wouldn't count on it... .50 BMG through 16" of Ballistics gel, then 12" of packed wet sand, with a video.

Sure, it's a powerful round, but having seen that, I would be very careful about the risks of overestimating the effectiveness of sand as a backstop.

MrCrowley wrote:I don't exactly have a much better track record than dyi now do I?

Not really. At this rate, we'll have to start using your name for the mess-up instead.
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Unread postAuthor: Moonbogg » Wed Sep 16, 2009 3:57 pm

I realized the power of real guns when I took the Venom camping and used it along side guys with guns. I remember watching potatoes shot at 1x gracefully float down range and find their place in the hillside. And then I saw a guy shoot a small 9mm pistol. I figured small pistols were actually kind of weak until I saw how damn fast that bullet made it all the way down range. It was nearly instant and I could clearly see the huge amounts of energy that little piston had. I won't even go into the guys next to him using AR-15's and hunting rifles.
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Unread postAuthor: jeepkahn » Wed Sep 16, 2009 4:13 pm

Ragnarok wrote:
jeepkahn wrote:...but even dry, hi powered rifle rounds barely made it through 6", so if you could do a 10" thick box, I would reckon that it'll stop anything you throw at it...

Wouldn't count on it... .50 BMG through 16" of Ballistics gel, then 12" of packed wet sand, with a video.

Sure, it's a powerful round, but having seen that, I would be very careful about the risks of overestimating the effectiveness of sand as a backstop.

MrCrowley wrote:I don't exactly have a much better track record than dyi now do I?

Not really. At this rate, we'll have to start using your name for the mess-up instead.


After watching the video, I think dry sand would've held up better, I think the wet sand allowed hydroshock to travel and destroy the box preventing the sand from "holding together"... But the gun that made that shot had a lil bit more energy than even Lardas Hygac...

That being said, What about the vacum cleaner???
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Unread postAuthor: Technician1002 » Wed Sep 16, 2009 6:49 pm

In regards to sand, it is not universal world wide. In tropical areas the sand from shells and coral is mostly calcium. In the Pacific NW where I live there is very little calcium in the sand from shells and coral. The sand is mostly volcanic which is primary silicon dioxide. These sands have differing densities, composition, grain shape, and gran size. The lighter calcium sand would have less stopping power than an iron rich volcanic silicon oxide based sand.
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Unread postAuthor: MrCrowley » Wed Sep 16, 2009 10:16 pm

The lighter calcium sand would have less stopping power than an iron rich volcanic silicon oxide based sand.

Well that's good, because Auckland has about 46 volcanoes and the sand I would get from the beach closest to me has a volcano about 2km out to sea (Rangitoto) which covered the area with volcanic rock about 10,000 years ago IIRC.

Expect a video of me shooting the .303 against 8" of wood sometime in the next few hours.

edit:
That being said, What about the vacum cleaner???

'Twas shooting a stainless steel pot lid with a fishing sinker, which I did not expect it to penetrate...but it did, destroying a crappy vacuum cleaning behind my target. :D
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