Underwood 10mm 140 Grain Xtreme Penetrator through bullet proof glass (plastic)

[my_old_glock]

10mm Auto 140 Grain Xtreme Penetrator through bullet proof glass. 

https://www.youtube.com/watch?v=WDvzul3rvTk&feature=youtu.be

https://www.underwoodammo.com/10mm-auto-140-grain-xtreme-penetrator-box-of-20/



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[10mmfan]

I'm impressed but I don't shoot at bulletproof glass very often so what's the point?

[Dave84]

I guess the ability to deal with anything. Why we don't shoot a lesser caliber.

[ram1000]

I'm always looking for that extra effect in a smaller gun.  In my case I carry out in the back country and want to be able to shoot through the worst case scenario, like a bullet proof glass bear...