At What Point Does Deformation Stop?


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rodwha
April 23, 2013, 09:01 PM
I read quite often how a PRB often rests on the opposite side of game animals up close, but passes through at longer distances. This must be due to the velocity. So at what point does this occur, and how does caliber/weight affect this? Is it an actual velocity (i.e. say 900 fps) thing or is it a momentum thing? Or is it something else or a combination of things?

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Don McDowell
April 23, 2013, 09:26 PM
Impact velocity and lead hardness are the big determining factors. A soft lead ball or bullet striking at relatively high speed will deform quickly. The quicker it deforms/mushrooms the quicker it'll slow down, the longer it takes to deform/mushroom the further it will penetrate.
Nose shape and bullet taper can have an affect but that's a whole nudder can of worms.

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