*pop* ting, ting, ting...

[ChargingCharlie]

I was just sitting here reading a book after loading some rounds and I heard a light *pop* followed by the sound of something small bouncing along the wood floor. I look over at the rounds I just loaded which were all set in a tray (primer up) and one of them was missing it's primer. All the brass was clean, I cleaned all the primer pockets, and I also made sure I felt an even pressure as they seated and that they seated fully. Is it possible that the change in room temperature (+10 degrees) caused the brass to expand enough and built up just enough pressure to push it out? Or could it be a flaw in the primer itself? I pulled the bullet from that piece of brass and tried seating a primer by finger pressure only into it and it wouldn't go so it definitely isn't super loose.

 

[01bmf]

The temperature change is a possibility, but I would imagine that it was combined with not being seated properly, if it was a factor. Maybe it looked right but didn't get seated quite right.

 

[01bmf]

Did you happen to resize any cases with the primer already in?

 

[ChargingCharlie]

Did you happen to resize any cases with the primer already in?

Nope, they all went right to belling and powder.

 

[bpm990d]

What cartridge and what was the load?

B

 

[supton]

Did you find the primer that popped out? I wonder if it was intact, and if it would still feel the same, if it were to be reseated again.

 

[ChargingCharlie]

What cartridge and what was the load?

B

.45 ACP WWB cartridge with 5.2gr W231 in it & a 200gr LSWC. COL was at 1.250"

 

[ChargingCharlie]

Did you find the primer that popped out? I wonder if it was intact, and if it would still feel the same, if it were to be reseated again.

I didn't find it even after sweeping and moving furniture. I live in a 210 year old farm house and my living room hardwood floor has some good gaps in it. It most likely fell to my basement which has a dirt floor.

 

[NavelOfficer]

Sounds like a worn out piece of brass. I've had range brass (mostly rifle brass) that was overloaded or worn at the primer pocket so much so that the primer would just fall out, not even with the slight push from seating a bullet. Barring some other unique situation, I'd guess this was the problem.

 

[JRyan]

Never had that happen. I would probably discard the case.