Expansion Depth of HPs on Brassfetcher.com

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dubious

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Ok folks... I've been looking at various brassfetcher.com HP penetration tests in ballistic gelatin. This stuff is pretty unpleasant, but I'm curious about the depth of expansion of Hollow Points. I noticed that in a lot of the hollow points (and other bullets) exhibit a sort of shockwave effect at a certain point in their path through the gelatin. Is that shockwave the point where the bullet expands?

45185gsw.JPG


.45 ACP Remington Golden Saber HPs

God forbid I should ever have to use these (or any ammo) on a human being, but the engineer in me is curious what depth these things start expanding. Regardless, I know it's the most responsible thing to use in a self defense scenario to avoid over penetration and possibly injury to an innocent.
 
I'm guessing you're seeing is the temporary cavity. The bullet expansion itself is relatively unintestesting and immediate.
 
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