Interesting tests

WOW!!

I found that extremely interesting. Not what I would have expected from the rifle rounds. Especially the hard cast .45-70. Thanks for sharing this. :)
 
Sand bags work real good and are cheap and simple. The best of all worlds. Even a .50 BMG won't go through much sand.
 
Careful on "how many rounds" fired.

I found this out the hard way.

Back in my younger NG days I was an XO for one of the Alaska NG Units on St Lawrence Island.

At the time the NG had a program called the "CNGB" postal match. Where units competed against each other in postal matches. The winning unit was sent to Nashville to comepete with other states.

We used M16s with sub cal devices fired a little targets (simular to what the Appleseed Program uses) at 50ft.

This was in the dead of winter which is quite severe on the Berring Sea so we set up an indoor range in the armory. We used C-ration boxes full of sand.

Worked great for a while, but after a couple hundred rounds we found the 22 shells worked their way through the sand and made some nice little holes in the armory wall.

Another interesting on topic tidbit, when I was a kid they use to have a show called "Believe it or Not" on TV. One show that stuck with me was the set up a sand bag with a plate of glass behind it. They shot it will a 22 which didn't penitrate. They then shot it with a bow and the arrow penitrated the sand breaking the glass.

Don't know why that stuck with me. The show also hung a silk hanky on the cloths line and shot it with a 22. It wouldn't penitrate the hanky, just pushed it out of the way.
 
Sand bags are mostly "self-healing" if the sand is dry and contained. You can shoot though a solid/filled concrete block wall fairly fast if you keep at it. But the biggest bang for the buck in barriers is the humble sand bag.
 
I was thinking it had to have something to do with the fracturing ability of the sand crystals absorbing the energy like ballistic ceramic plates.

That compiled with the abrasiveness of the sand particles has to be more destructive the more force you throw at it, like water, the hotter the round the faster it disintegrates.

Nice to know a few easy to store sandbags could be used to build a relatively bullet proof wall impromptu...
 
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