Blown out primers? Why?

kalister1 · Mar 7, 2016

Mini14tac said:
I have some Freedom Munitions factory reloads in 300 BLK and on occasion I find spent rounds with the primers blown out of the brass. And yes one fell into the trigger assembly. Don't think I will be purchasing any more ammo from them regardless on how cheap it is.

71Chevelle427 said:
I did not save any of the brass, but intend to try again, until there's another failure, and will save and measure for you guys.

Thanks and sorry for not quoting.
The Post before me said he had the same problem. I should have quoted that post.

Mini14tac · Mar 7, 2016

I have the brass, I'll have to find it in a big bag of mixed spent brass.

Mini14tac · Mar 7, 2016

Found em! Here are the measurements. I used my dial calipers and am not a reloader yet. None were split to bulged.

Case 1
Primer pocket ID .176
Primer pocket depth .112
Overall case length 1.357
Neck ID .311

Case 2
Primer pocket ID .177
Primer pocket depth .119
Overall case length 1.360
Neck ID .314

Case 3
Primer pocket ID .183
Primer pocket depth .113
Overall case length 1.358
Neck ID .314

Uncle Duke · Mar 7, 2016

A good sneeze would have blown a primer out of case 3.

http://ballistictools.com/articles/primer-pocket-depth-and-diameter.php

kalister1 · Mar 7, 2016

I just Mic'd a few primers @ .175"
Using pin gauges I checked a few empty cases @ .174"

I think you can guess what the problem is?

Blown out primers? Why?

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