Is there a good site for gel reports?
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Jorg Nysgerrig
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Our own JE223's site is a good place to start:
http://www.brassfetcher.com/
http://www.brassfetcher.com/
NMPOPS
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Check out You Tube. Lots of video on ammo testing.
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Sent from my Ally using Tapatalk 2
Loosedhorse
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Smaller calibers here: http://www.goldenloki.com/ammo/gel/tests.htm. Older data here: http://www.chuckhawks.com/handgun_power_chart.htm
Also, sometimes individual manufacturers will have that info. See for instance http://www.hornadyle.com/products/index.html
Caveat lector.
Also, sometimes individual manufacturers will have that info. See for instance http://www.hornadyle.com/products/index.html
Caveat lector.
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Brass Fetcher
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What sort of data are you looking for?
Shawn Dodson
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"Volume" of what? Permanent cavity? Temporary cavity?
The FBI calculates permanant cavity volume simplistically (and incorrectly). It calculates the area of the expanded bullet times penetration depth. It assumes the diameter of the permanent cavity remains constant from beginning to end of the wound track. In reality the diameter of the permanent cavity decreases with penetration, because as the bullet's velocity decreases with penetration it gives soft tissues more time to stretch and move out of the bullet's path. At the end of the wound track the diameter of the permanent cavity can be very small.
The FBI calculates permanant cavity volume simplistically (and incorrectly). It calculates the area of the expanded bullet times penetration depth. It assumes the diameter of the permanent cavity remains constant from beginning to end of the wound track. In reality the diameter of the permanent cavity decreases with penetration, because as the bullet's velocity decreases with penetration it gives soft tissues more time to stretch and move out of the bullet's path. At the end of the wound track the diameter of the permanent cavity can be very small.
http://ammo.ar15.com/project/Self_Defense_Ammo_FAQ/MiscDocuments/HandgunBulletchartaspicturerev3.jpg
This is what I was referring to. I'm not sure how they found it, but they had volume, diameter, and depth listed.
This is what I was referring to. I'm not sure how they found it, but they had volume, diameter, and depth listed.
A guy who goes by DocGKR on various forums is probably the most trustworthy commentator I've seen. Some sites do have indices of actual ballistics tests but it's a lot of work to standardize the results since they use somewhat different methods.
Pubmed.gov actually has some, not sure how many. Just search ballistic + other search terms (e.g. ballistic gel, ballistic performance, ballistic handgun, ballistic jhp...).
Pubmed.gov actually has some, not sure how many. Just search ballistic + other search terms (e.g. ballistic gel, ballistic performance, ballistic handgun, ballistic jhp...).
Shawn Dodson
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and...
Ordnance gelatin is an engineering evaluation tool to assess the ability of JHP handgun bullets to expand robustly. It is the most valid soft tissue simulant currently available. JHP handgun bullets are designed to expand in soft tissues. In a defensive shooting the kinds of tissues we are trying to destroy are all soft tissues.
More info challenging popular misconceptions of gelatin testing can be found at: http://www.firearmstactical.com/tacticalbriefs/2006/04/03/0604-03a.htm
Shawn Dodson
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It appears you'll need to contact the whoever posted the info at AR15.com to learn how the "volume" was calculated, if the information isn't already presented.
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