I did a topic search and did not find this subject so I am posting. I was hand priming and ran across one piece of brass no not snug like some of the Winchester brass has been reported to be but definately crimped in. Those of us with a progressive press will be cursing this head stamp worse then those five head stamps that Ammoload is using for the reduced capacity cases.

If I had been running this batch of 9mm in my Load Master it would have been a Kaboom for sure. The headstamp is WMA 17

Most likely from military ammo. Surprised this is your 1st encounter with crimped in
primer on a 9mm shell.

The head stamp is probably Winchester and the 17 is for 2017 when it was produced.

cootduster

Does it have the NATO cross in it?

I look at every 9mm headstamp as I sort my dirty brass. Anything with the NATO cross (which indicates a crimped primer) goes straight into the recycle bucket.

Life is too short for that shit.

Same. Curious about the Ammoload stuff mentioned by the OP. Never heard anything about that? Or are those the "stepped" cases everyone talks about?

Yep . . . those are the stepped cases: viewtopic.php?f=74&t=32729

Yea, I had 2 of these a few months ago. I spoke to Thor over at Pinto's, he told me this is somewhat common in a few European countries. Now I double check each case as I take it out of the tumbler.

Steve, great pics and explanation

Pete

I use a hand press for depriming, also so I can keep my sizing dies cleaner. Those crimped ones take a good bit of muscle to get through, but if you apply steady pressure it seems to work better than jamming it down, for what it's worth.

I was depriming some 9mm range brass a few weeks ago and came across a (AMMOLOAD) (9MM LUGER) stepped case.

I need to check.all of the other 9mm brass I have for this garbage.

Are there any other caliber stuff to.look for?

When I sort 9mm brass, I pull out:

- Any with the stepped inside (AMMOLOAD, FM, and IMT head stamps)
- Any with the NATO cross (plus sign in a circle, like scope crosshairs), which indicates a crimped primer.
- And of course, any steel, aluminum or weird cases, including those that are damaged.

I hand deprime and you can feela crimped case. They go in a different bucket.

Ive had crimped cases slide through tho, I can feel it when in the prime stroke of the progressive press. I DONT force them, just touch it on the pocket reamer real quick and put it back in line.

Honestly I was worried about exploding primers, so I set up a press outside on my trailer and fed them in crooked, upside down, mashed them as hard as I could, even double stacked them.. I could not get a primer to explode.

Most of the really mashed one will still fire properly also. Only the really crooked ones that tear the side off as they go in dont seem to pop in a firearm.

Its always great to be cautious, and heed warning, but also rewarding to be curious.

I've had primes get squished in side ways and other positions and no problem. I think they go bang when they are struck sharply. I only personally know one person who had a primer go off in the loading room and that was years ago. I dont remember the details except it scared him at the time.

NOPE, life is not short.....it is the longest thing you will ever do

Compressing will not set them off only fire and a sharp blow will. Hit one with a hammer and see what happens.

This is what happens when a good primer goes bad: viewtopic.php?f=74&t=46404&p=398022&hilit=primer+lee+loader#p398022

It's only happened once, and I don't use that Lee Loader kit any more (but I still have it and several others). I use a priming tool now that has it's own issues.