Fist results with the Trom-Boyn

[boyntonstu]

Using 200 psi my new break barrel shot a 10d dart through 3" of phone book and through a 5/8" sheet of plywood behind it.

Audacity from my 1 foot chrony. How fast was it?

[rp181]

fast.
Thats all we can say with a picture.
Highlight the beginning of the first peak to the begining of the second peak. audacity tells you the length in seconds at the bottom.
1/x=time
x=speed in fps

[CpTn_lAw]

I' d say roughly 650-700 fps according to your file...took 0.0015 second to make 1 foot, ==> ~667 fps.