This Happened to me!
Primer went off while extracting a bullet from a live cartridge!!
Facts: I had a case with an expanded primer pocket. The primer went in super easy but did not fall out. (I shot too many hot loads and didn't bother to pitch the case when I noticed the loose fit but decided to use the case one more time).
What Happened:
For whatever reason, I don't remember why, I decided to change my load and wanted to pull the bullet on this cartridge with the loose primer pocket. I put the cartridge in the kinetic puller and started hammering away. All of the sudden there was a loud "POP" and the primer seemed to jump straight up in the air and go off.
After further deduction, I beleive this is what really happened:
On one of the hammering impacts, the loose primer bounced up, but did not fly out because of a slight restriciton around the rim of the primer that kept it from flying completely out of the shell. Now with the primer sitting approx. 1/32" above its seat, the next hammer blow drove it forward with enough force so that when it hit the base of the pocket seat it went off./ubbthreads/images/graemlins/shocked.gif
When the primer went off, the pocket was loose enough that it launched the primer straigt up and away from the case.
Luckily for me the ignition of the primer launched it away from the powder charge and it did not explode. Luckily modern rifle propellants do not ignite easily. Had it been black powder, things may have turned out differently.
If that cartridge would have exploded, I would probably have had lots of plastic and brass in my eyes and face.
I still consider myself extremely lucky that the poweder charge did not ignite.
I have not used a kinetic puller since, and don't intend to ever again.
I also don't use cases with loose primer pockets anymore. If I press in a primer and I feel that it went into the case way too easy, I will put the empty case "with primer only" , into my rifle, fire off the primer and pitch the case. (never throw an case in the trash with a live primer as its a great way to make for a high fire potential for you or your trash man).
Reloading is a very simple process, but its also very simple to make a life altering mistake. Always use forethought. I decided to pull the bullet from this cartridge several days after I loaded it and forgot that I had a loose pocket on one of the cases. To prevent this from ever happening again, I simply don't use cases with loose pockets.
I also read about a guy that had a bolt go thru his hand when he chamered a re-loaded round into his 30-378Wby. I read that it could have been a broken firing pin that was protruding thru the bolt face. It could also have been a loose primer sticking out partialy so that when he slammed the bolt forward, it went off.
There are so many variables that its hard to say what happened.
All that we can do is to learn from other peoples mistakes and be aware of as many hazardous possibilites as we can. Remember nothing is full proof. Be meticulous about inspecting your equipment and cartridges .
Good luck and be safe,
Vic