Report : Temporary Cavity Velocity for Pistol and Rifle projectiles in ballistic gel

[Brass Fetcher]

It's a perfect study -- perfect studies end with "Further study is indicated."

Beautiful ... . It would be nice to do a more exhaustive study on this subject ... we can (and have been recently) setting up the high speed video so that the TC can be accurately measured. This is in addition to measuring the primary effects like KE at depth or overall penetration, so it's a bit tricky to get all effects measurable on the same camera view.

Because that's what they decided to use as a standard when testing penatration and expansion. You can test in 20% and convert results, but that's not even what JE223 is doing here he is using 20% as a material of a known density to calculate radial energy.

That, and also there are other benefits to 20% gelatin over 10%. One is the historical database - almost every shot done by western militaries since 1931 (at least) was done in 20% gelatin. So, if that data ever were made publicly available, the database could be expanded by the addition of repeatable private testing like ours in addition to being able to augment the testing by a comparison to past/similar results.

20% is also much more temperature stable - with 10% we calibrate the block 24hrs prior to the actual firearm being fired, refrigerate for 24hrs and then shoot. At room temperature, 'core' measurements on 10% usually goes up about 1 degree F every two minutes. Leave it out for about 10 minutes and the block is now out of spec for the next 24hrs. These problems exist to a much lesser extent with 20%.

 

[gvf]

Beautiful ... . It would be nice to do a more exhaustive study on this subject ... we can (and have been recently) setting up the high speed video so that the TC can be accurately measured. This is in addition to measuring the primary effects like KE at depth or overall penetration, so it's a bit tricky to get all effects measurable on the same camera view.



That, and also there are other benefits to 20% gelatin over 10%. One is the historical database - almost every shot done by western militaries since 1931 (at least) was done in 20% gelatin. So, if that data ever were made publicly available, the database could be expanded by the addition of repeatable private testing like ours in addition to being able to augment the testing by a comparison to past/similar results.

20% is also much more temperature stable - with 10% we calibrate the block 24hrs prior to the actual firearm being fired, refrigerate for 24hrs and then shoot. At room temperature, 'core' measurements on 10% usually goes up about 1 degree F every two minutes. Leave it out for about 10 minutes and the block is now out of spec for the next 24hrs. These problems exist to a much lesser extent with 20%.

You'd have to read the whole FBI report. It didn't state that all shootings involve BGs who fall no matter how and where they are hit. Just that some do and it is therefore a factor found in the field relevant to the topic of handgun wounding and effectiveness. There are many others the report goes into as well. It is a comprehensive study.

And of course it's still your choice as to whether or not you believe it.

 

[jaholder1971]

This study further proves what we've all known...

Shot placement is everything.

 

[VBVAGUY]

I wonder how the .357Sig would have done ??? God Bless

 

[Brass Fetcher]

It should be very similar to the .357 Magnum.