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Anyone ever before mix up negative gravy (corn starch) for cartridge test medium?
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December 29, 2010, 08:13 PM#1

Weather is lousy, so it is around that time of year when I carry out something worthless favor test cartridge performance. Gelatin is about $8/lb. Corn starch is about 80cents/lb. Somewhere roughly 8/1 (water/starch) seems to make some pretty an excellent gelatin (or an extremely bad gravy
). Ns was simply wondering if anyone had actually tried it and also how that worked.

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December 29, 2010, 08:22 PM#2

not sure exactly how it would job-related for simulating soft tissue however at least it would offer you a baseline for comparing bullets to one another. I"m not sure what the ratio is but mixing corn starch and water creates a non-newtonian fluid and at the immediate of influence acts more like a solid. Supposedly bullets tend to penetrate twice as far in water as they do in ballistic gel(and therefore flesh) and also that is why the nice feller at theboxotruth.com offers gallon jugs that water.

This is a heated solution, so the thickens. As soon as it cools it deserve to have the consistency of jello or thicker. I"ve tried 2/1, 4/1 and also 8/1. They aren"t fully cooled yet, however it is looking like probably 6/1 is the best mix.Might be kind of a pain come pour right into molds and cool. I want enough to test 5 bullets, and I"m reasoning I"ll need a same amount for the 45/70 and 44 mag.
this sounds type of fun. Let us know just how it turns out. I could give it a try, if you have some decent results.

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How about filling an empty plastic milk container through this stuff? i wouldn"t stand as well close at moment of impact!
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The much more force the is used to a non-Newtonian fluid, the more viscous the fluid becomes. I am guessing that there is a limit to the viscosity that deserve to be achieved, but I"m not sure that shooting at one is a an excellent idea.
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