Primer detonation in 1050

[JohnC]

Well on Friday got my first primer detonation in my new to me Dillon 1050. scared the bej*sus out on me ( #3 in 20 years of reloading, the other 2 being on RCBS equipment) . It was extremely loud to say the least.

After recovering my composure , and clearing the press, looked for the cause. Discovered that the .45ACP case (Federal) primer pocket still had a circle of primer material (the side part of the cup) within the pocket , and that it had been swaged properly.

In flipping the case over , I discoverd that a ####ing 9mm case had managed to find its way inside the .45 case (9mm primer was punctured but still in), causing my decapping pin assembly to get bent as well., As far as I can tell, either the bent decapping pin caused only the bottom of the .45 primer to get out leaving the outer circle still in, or the old.45 primer was still in and when the new one detonated it blew out the bottom of the old one. I suspect that the latter is what happened, especially given the very loud noise level

Anyway, thanks to Mr Dillon's engineering and the gods above no damage to the press beyound the decapping pin assembly . Moral of the story- check your cases carefully! I occasionally had caught .40 S&W cases in .45ACP- they stick out and are quite visible, but a 9mm will hide quite nicely inside a .45ACP case.

 

[roberti11]

Primer Detonation

Happened to me once as well with my 650, thanks to dillions enginerring no problem. They sent me an entire new primer assembly for the cost of shipping, they insisted they did not want me using any part of the old one.
As usual with them it was a no BS exchange

 

[SDC]

Scary, John; I'd at least have to do an underwear check

 

[sunray]

"...9mm case had managed to find its way inside..." This is why one should always inspect the brass before loading.

 

[JohnC]

Scary, John; I'd at least have to do an underwear check

That's what I meant by "recovering my composure" (after I'd uncovered it to check).