I was trying to see at what sort of pressure different discs would burst, and quickly discovered that across a 6mm diameter area, it's pretty high. With a single layer of ordinary transparent tape, it held right up to the maximum pressure I could give it with my shock pump (around 400 psi) and only burst when I unscrewed the fitting slightly. I ran a BB through the chrony and got 1032 feet per second, so I tried again, hence the above result
I was going to try it as a hybrid but to be honest I think I'd rather do some more high pressure air tests for now:
It's interesting that in spite of the smaller chamber than the final version of my HVBB project, the velocity with 0.12 gram BBs is much higher - clearly some sort of valve bounce is the problem. Enough of that, I have more holes to make
As always, for more detailed information on using epoxy, check out the how-tos here and here.
edit: videos in action
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0.25g BB at 1017 fps straight through a steel (empty!) lighter fluid can
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0.12g BB at the same can, only penetrated one side. Sadly the chrony didn't get a reading.
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0.25g BB at 982 fps straight through a plastic toy container
edit 2 - rehosted images and cleaned up video links
