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Capture Peak Strain Gage Fluctuation For Shotgun Chamber Pressure Measurement
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tautech:

--- Quote from: Silver_Is_Money on December 17, 2023, 12:59:32 am ---I'm 68 years old and I have been reloading metallic cartridges (rifle and pistol) and shotshells since the age of 16.   

I also have a wildcat 6.5mm rifle chambered to my own design, so for that one there is no looking at manuals.

--- End quote ---
Similar experience of decades of reloading shot shell and rifle loads.

Still not sure what your intentions are logging shot shell pressure curves.
There are a wide range of shot shell propellant burn rates available and loading data for each.

Rifle wildcats are no longer the challenge they once were with SW like Quickload now available where you can tailor loads to bore, projectile weight, cartridge volume and propellant.
Over on Accurate Shooter forum you frequently see someone asking another member to run a Quickload simulation on some combination of components you wouldn’t find in reloading manuals.
Silver_Is_Money:
I call my wildcat the 6.5mm LWS.  It begins life as a 270 brass, gets necked down and blown out, and has a water capacity (for Winchester brand brass) of 74 grains on the nose (vs. ~67 grains for a 270).  I mostly have shot 140 grain Hornady flat base spire points.
tautech:
Similar to the decades old 6.5/06 then.
David Hess:
I have done what you suggest but it was not with firearms.

Any digital storage oscilloscope can do what you need.  You may need several tries to get the gain of the amplifier and trigger level adjusted properly.  Back when I did it, I used an analog storage oscilloscope although DSOs were available.

Besides mechanical issues, like delamination of the strain gauge because the peak strain is too high, the largest difficulty will be with the strain gauge amplifier because normally they are limited to lower bandwidths for performance and noise reasons.  This should not present a problem now because there are many modern fast low noise precision parts.
Silver_Is_Money:

--- Quote from: David Hess on December 17, 2023, 01:57:00 pm ---I have done what you suggest but it was not with firearms.

Any digital storage oscilloscope can do what you need.  You may need several tries to get the gain of the amplifier and trigger level adjusted properly.  Back when I did it, I used an analog storage oscilloscope although DSOs were available.

Besides mechanical issues, like delamination of the strain gauge because the peak strain is too high, the largest difficulty will be with the strain gauge amplifier because normally they are limited to lower bandwidths for performance and noise reasons.  This should not present a problem now because there are many modern fast low noise precision parts.

--- End quote ---
Is there a reasonably priced amplifier that you can recommend please?
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