Could I Please Get A GGDT Read Out?

Cannons powered by pneumatic pressure (compressed gas) using a valve or other release.
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rna_duelers
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I was wondering if someone could please use their GGTD to have a fps reading?The specs are as follows.

1/2 barrel at 90cm.
1inch modded sprinkler valve.
2inch chammber at 30cm.
8gram projectile.
130psi.
60ml dead space(estimation).

Thank you.
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killagorrila99
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do it yourself u lazy bum!
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rna_duelers
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I cant,the GGTD doesnt work on my accient machine.
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LucyInTheSky
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440fps

And this message is not too short any more.
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rna_duelers
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440fps...that sucks ass!lol any ideas on how to get the fps up?
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LucyInTheSky
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A 2m Barrel would shoot at about 571fps.
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rna_duelers
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But thats 2m...lol..ohh well the 440fps will have to do,not very sniper like if its only 440fps :cry: :cry:
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LucyInTheSky
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Its still a lot considering its home made. Did you think your gonna get mach3 or something?
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rna_duelers
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Nah,but i was hoping for atleast 550fps and after i saw that pneumatic called the gas sampling gun getting to 800fps(kinda copeid design) i was hoping my cannon would get to atleast 550fps.
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