Several folks, me included, were surprised that the .357 Magnum didn't penetrate the helmet.

So, I decided to give it another try.

I loaded up some .357 Magnum, 125 grain JSP (Jacketed Soft Points) to top velocity.

I loaded a maximum charge of Blue Dot to give this bullet it's best effort.

Here I am shooting it.

Ear splitting muzzle blast.

It didn't penetrate, but did something surprising.

The spall that blew out the back caused the water jug to leak.

Look at the water jug in the picture.

That hole was caused by spall blow-out.

I then tried my best effort, a 158 grain hard-cast, gas-checked SWC at maximum velocity.

Loaded Hot!

It made a huge bulge in the helmet, but still did not penetrate.

When we got home, we used a Dremel tool, razor knife, and pliers to try to peal back the kevlar to find the bullets, but after about 15 minutes of cutting, we gave up.

One thing for sure, the bullets weren't even close to penetrating the helmet.

Now, with the 125 grain JSP, the helmet was in contact with the water jug and the spall caused a hole in the jug.

But it did not penetrate the helmet.

A bunch of folks are always asking me to try a CZ-52 in 7.62 X 25.

I got one and we will try it today.

These are supposed to be excellent penetrators.

Here it is.

Here's Tman shooting the helmet.

I caught him in full recoil.