Just an FYI from an experience.

Was taking apart some loaded rounds with an impact style bullet puller.  I have done many rounds with it before.
The other night as I was whacking the hammer trying to get a bullet to unseat I heard a load bang.  Sounded like the old cap guns we had as kids.  Startled me a bit.  Turns out the primer went off somehow and since the cartridge wasn't chambered the primer was propelled out of the case. It left a small indentation in the drywall ceiling about 9 feet up.
Not sure why the primer went off but made me realize that had the primer hit me in the eye I probably would have been given a new name....one eye.

I will make sure to always wear eye protection from now on; both when reloading and dismantling cartridges.

Wow! I have stepped on primers before and had them go off under my slippah but never seen one go off in the bullet puller. I also had one go off while running a case with a live primer through the decapper. I imagine that was to be expected.

Thanks for the reminder to always wear eye protection.

Wow! I have stepped on primers before and had them go off under my slippah but never seen one go off in the bullet puller. I also had one go off while running a case with a live primer through the decapper. I imagine that was to be expected.

Thanks for the reminder to always wear eye protection.

Surprised the sh!t out of me. Never expected it.  So much force it left an indent the size and depth of the primer after traveling almost 9 feet.  Think I'll use the bullet puller outside (with eye protection) from now on.

Surprised the sh!t out of me. Never expected it.  So much force it left an indent the size and depth of the primer after traveling almost 9 feet.  Think I'll use the bullet puller outside (with eye protection) from now on.

I can't imagine how many 1,000's of rounds I have taken apart with my first Kinetic Bullet Puller. I now have a new one since the old one finally broke after 30+ years of use. I attached a picture of my first one and the box it came in.

I have heard of Federal primers being so soft that they will ignite in a bullet puller. But like I said, your experience shocked the shit outta me.

Was there powder in the case?

Holy crap! Glad that you're ok!


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Yikes 
That's why a use a press mounted bullet puller

Sometimes a load just doesn't work out and is not accurate. I have to weigh the labor of pulling bullets against the cost of shooting the remaining bullets and reloading. Usually the later wins out.

Was there powder in the case?

Yes, there was. Not sure why it didn't go off.  I consider myself pretty lucky this time around.       

Yes, there was. Not sure why it didn't go off.  I consider myself pretty lucky this time around.       

I imagine that the primer hole is small enough that the pressure is enough to propel the primer to the ceiling without setting off the primer. I guess if that was a common occurrence, they wouldn't be able to sell many of them without lawsuits.